Fantastic to hear, I was not aware Next would be in Unity3D. Even more excited now.
I fear a lot of people will not get into creating custom objects if we do not have a built in 3D modeler, I'm pretty sure only a very small % of the playerbase has Maya or Blender installed and are proficient in them. It might be too much of a stress for most people.
We definitely need to be able to import 3D models though.
The multiple frames edit idea is fascinating as fuck and something I never thought about before. It turned me on a bunch at first but there are a couple of inconveniences, like it taking up a bunch more time than a regular turn, bumping up replay file sizes siginificantly and needing special controls to utilize it. Under pressure of a competitive match this might be a bit over the top for a player to handle in a short ammount of time.
It could be expanded into a sparring helper also, which would be a quality of life change especially for me who's a pretty fast worker.
Say I am sparring a less experienced player at 10 turnframes and infinite reaction time(most people seem to prefer this). I take 15 seconds to complete one turn and the other guy takes 30. That's 15 seconds of dead time for me every single turn. Take your idea and expand the turnframes from 10 to say 100. Now I get to spend my 150 seconds editing my tori like I would in singleplayer and space out when I am done. Then I get to shitpost on the forums or browse reddit for another 150 seconds until the other guy is done editing, making for a more efficient time to fun ratio, rather than me sitting idle in the server for 15 seconds every turn.
Combine this with a visible realtime ghost for players and sparring could become really fun again, and a much more streamlined experience.
Good suggestions, I like those