In my opinion I personally didn't care about Bloody Angel Unit, because I prefer to start from part 2, but next update will most likely force you to pre-farm in part 1, if you will want to beat new difficulty mode. I noticed that many players like to play from part 1, well I'm opposite but they will be able to experience more content, and have a way to ditch bloody anglel early.
Now that you say that is even more understandable (besides the actual extreme effort to modify and put a scrollbox) of adding more than 30 commanders. It actually makes extreme more sense of why you said that previously, which is completly understandable if you focus more on part 2.
Meanwhile I've been using Bloody Angel for the express goal of losing specific battles, like the one needed for Silky.
Just to assure, I'm not asking to "delete" her from the game. What I'm saying is that, since when some plays part 1 before, they already have a considerable roster, not only of characters that are strong, but for the characters they like (for example, I have a tendency to pick girls over dudes, just a thing of mine). But if there's a limit of 30 commanders, then the player should at least have a bit of freedom to pick what he wants at begining of part 2, otherwise it gets even a bit rough to get other characters on that part.
Funnily enough, and I've just noticed this litteraly minutes ago, but if you do the character clear of Natori and clear her in part 1 by defeating Orochi, she also keeps being tagged as important character (and I assume with Fuuka the same happens too), and you have no way to dismiss her at all on part 2 as well. Not that I don't like her, on the contrary, her character is extremely useful, but it's still pretty funny for that to happen. With that in mind, in a roster of 30, I already have 6 (Rance duh, Suzume, El Mofus, Natori, Bloody Angel and Bezeleye) that I can't mix (or at least mix as the 2nd unit).
Speaking of Miki/LP, have you considered making her a NG+ bonus? She's already in the vanilla game.
Her model is quite cool yes, it would be appreciated. Although my guess is that she might be hard to balance, or at least hard to get, to be at least faithful to the actual plot, after all she's the DK. Unless it is possible to have Miki character, but it was quite some time already I've played the DK route, if I recall correctly you can't. I usually play Ran's route because I like the character and it's the only one she doesn't die, but yeah. But would be hilarious if there was an hidden even where you could get Miki and after some time she "upgrades" to LP.
Unfortunely I'm currently with university exams besides work, but when I get some free time I'll try to dive deeper again into the resource tools at mireheze.