I love autobattlers and genuinely think this has some potential once all the pieces are in place!
The generation system is super unique, allowing you to use any member in a slot and see them perform differently isn't something I've seen before (granted I'm not super deep in the genre, just like playing them)
I noticed that I got to round 4 (or maybe 5 cause I had 3 members and 1 upgrade) the game locked up, so I ended the run, and restarted, and the first combat went through my old party, so it looks like it wasn't properly reset when the run ended. I think they all died, and then the combat resumed from the first round as expected.
But it would be awesome to see you come back and polish it up, I think you have something really unique here, and it deserves to be given a fair shot. Great work!