The thing I’m worried about is that units might just lose their niche if now every unit can become every other unit.
That’s not necessarily a bad thing, so long as the units can be themselves. While there’s still some kind of reclassing-type thing going on with the Exam stuff, I’ve always found it silly that, for example, Cherche’s background specifically notes that she was a Cleric before becoming a Wyvern Rider, and yet, due to FE’s class system, she has to reclass just to have access to something that she’s already been trained in previously. With what Three Houses is doing now, it seems like that would be accounted for at base.
I found a lot in the trailer that sparked ideas for my own machinations, which was nice (but time-consuming to document - seriously, took me around 2 hours to compile my thoughts on a 5 minute trailer and the press text and screenshots on the official website…) and while I take umbrage with certain aspects - the tropey mystical JRPG protagonist “you’re special and that’s why you’re the hero/professor” thing, as well as only being able to apparently support/teach a single house (why? you’re a professor, you should be teaching everyone…) - I was legitimately impressed with how it seems like they’re evolving the series, at least mechanically. While it’s not something that can probably stick around long-term, due to how things seem to really be structured around your position as an instructor, being able to guide and choose how units are built out gives me a very Valkyria Chronicles II vibe, which is great, since the class/character system (including upgrading) in it was significantly better than the rest - must be something with Academy settings, I guess.
I’m super behind on actually playing FE games that I own (heck, I’m super behind on playing games period), though, so I don’t think Three Houses is going to be anything I go out and pick up early - the special edition doesn’t have any gated content like Fates did (well, for those of us still living in bumsville nowhere with internet speeds that should be criminal these days, having entire games be DLC is basically like gating content) and even if there’s an Awakening-like shortage of physical copies at launch, by the time I’d be ready to jump in, stock shouldn’t be an issue. But, I’m definitely looking forward to see more of the game and some of the mechanics that we haven’t really gotten a lot of details on yet.