Okay, some commentary on the outline updates. I admittedly have a couple of beefs here, some which were somewhat addressed in chat. But given that you said you'd forget, I might as well bring them up here.
Problem 01: Pushback of Selena fight, and the immediate recruitment issue.
Selena's second fight was placed during the Island escape sequence initially. This, I feel, was a good idea for varying reasons. Amongst other, this seemed like a good point to bring that subplot to a climax (and deal with the aftereffects of handling it badly there). She would then, if she survived, be recruitable if you took the right plot options later on after the timeskip. It also wouldn't make it immediately obvious that she'd be recruitable at that point, with the way I see it. It's a matter of timing, for one.
The next reason: Second fight with her, she's ideally using a strong flow amplifier (with a potentially fatal drawback). The idea would be that she's up against whatever party Isolde would be head of that was split off after the UIM was obtained, out of the eyes of superiors (and her mercenary followers would have said variants of "Screw this, I'm taking the advance and . The big reason why the second fight with her before the timeskip, but recruitment after: She would need time to deal with the shock of having lost even at what would be her strongest. The fact that revenge is apparently just not possible. The fact that this is a fight she just can't win. The hatred stays, but the logic sets in.
Reason the third, and one that if ignored would be open to some -serious- fridge logic. Why would she join up with her 'enemy' right after trying to kill her again? Why would Isolde -consider- such a thing right then and there? It'd sound like a bad judgment call to me. Not exactly a victory for pragmatism there. The timeskip gives things time to cool down if Selena lives through the second fight. I wouldn't see another attempt to kill her there, though. Seems to me more like it'd be a somewhat out of the way thing, there. Somehow seeing the recruitment occurring in a bar--if, of course, you appeal to pragmatism and logic accepting that you're not going to make her hate you less instead of trying to mend things over.
Problem 02: Apparent removal of segments and ignorance of antagonists
It seems like things were unusually shortened--at the request of others. I understand that this is partly due to the outline being just that; an outline. At the same time, however, it feels like some things were shortened a bit too much. I'll go over a few spots that gave me a bit of irritation and what I could see doing there.
First Practitioner's Island: Aside from the second Selena fight being pushed back (This was just covered, and I have no intention of going back over this), the island was originally going to be set up as a fake endgame. It was originally seen that it would potentially be a split-party dungeon, with a significant boss from the losing faction on each path (or a chain of such bosses if there's a lack of split-party). Splitting's easy enough to justify (detection), and I imagine that even if they docked on a different section from the Imperial and Guardian ships, there'd be some crossover of paths. Plus shortening the escape sequence, well...aside from the issues above, feels like Isolde's underlings would follow to help her rather than just leave with Noemi. (Okay, Faulheit might be tempted to leave with Noemi, but Katarine is pushy). I guess it just feels a bit too 'convenient', so to speak.
Missing people: None of the subordinates aside from Josef and Orienna are mentioned. I'm not sure if this was intentional or just a side-effect of the outline format. Cutting characters is the last thing I want to occur, though, especially since we need named subordinates that don't do something like show up for one chapter just to be killed off in the same chapter before anything like meaningful characterisation can occur. I'm looking at you, Fire Emblem.
Shortened Campaign: The campaign against Tiercek (from start to Tiercek's death) feels too short. I more imagined it as earlier described; four separate missions to differing areas for party members; more overt military-style ones for Isolde and Yiu, and covert stuff for Noemi and Mirek. Possibly with selectable parties for those, and a relevant significant antagonist as boss there. After that, then a fortress/capital raid (Split-party dungeon pulling out the stops. We're going after the BBEG, we might as well make this sequence as impressive as possible. We can put nameless midbosses here.) culminating in the fight against the BBEG (In this case, Tiercek). The stuff afterward is fine. I just want a bit longer of a campaign here, so to speak. I know I'm asking for something that goes against the request to shorten it, but this feels a bit too short as-is.
Also, I have a bit of an idea on how the Gier fight on the Guardian path should go down. It is viable to have him be fought alone
That aside, a bit of commentary and an idea.
Not seeing the High Commander being her father. That feels a bit...eh. Perhaps having a relative on the council (We do need to fill those guys out, after all!), but not the High Commander. It makes the level of trust in her ability feel a bit more significant if the High Commander isn't directly related by blood to her, after all.
Gier having killed Claire's sister: Thought we were trashing that storyline. But if not, that would be a nasty way to have that subplot end in a downer
Isolde and Selena, regardless of how they are now, were at one point friends of a sort. If Selena does die, I can see Isolde taking some kind of memento if she does die during the second fight (Possibly the amplifier[likely burnt out at this point, just to keep it from being directly usable], making it an accessory specific to her at that point). Just an odd thought, not necessary, and a more silent way of mourning.
Other thoughts on Isolde: She's the type who internalizes a lot. That much is readily apparent. It would make a good point that, at some point, she likely would have to release her suppressed anger and frustration at some point. I'm not sure when, but it's something that would probably be seen looming ahead; it would happen, the question is just when and how.
