I personally draw my own custom outfits for vtuberkit use and I would like to suggest having more model design slots for such things if possible? (it might be just a me thing since I don't know a lot of people who go through the effort of drawing an entire outfit, but if I recall correctly you've posted about planning on adding more things regarding clothes and the like on twitter, and I've personally already used 5 of the slots!)

More save slots would require a huge rewrite of the save system. I'll consider switching over to a system that allows for infinite save files by letting users add/delete as many slots as they want for themselves. But I cannot promise anything at this point.