It's an interesting concept but with a lot of opportunities to improve:
For example: Choose which floor to send each party, Choose to which team to swap a hero, maybe add a subquest to get new materials (as some heroes just keep the money and didnt spent any), in line with the first, state how many members can a team have (sometimes it has 4 members), add additional commands in battle, maybe a button to force flee or a "remote buff"to help the party