The timers between rounds need to be longer.
Title.
I don't have enough time to do anything. In the few seconds between rounds I need to check what I can make with the items I have, decide who to put them on, buy/sell, swap who's on the board, and position them accordingly. There's not enough time to do all that, and sometimes I even feel like whether I win or lose a given fight is less about my strategy up to that point and more about how fast I was clicking the 10 seconds prior.
There's a fair amount of changes TFT needs but I'd say longer gaps between rounds is among the more important. (Most important is hugely reducing the dependency on pure rng.)