Nothing major, but only having to hit 1 button instead of several to remove boosts would be a nice quality of life improvement.
It could go on the opposite side of the opposing team from the ‘VS’ logo and fit right in.
Or just have the software remove all boosts when a match is over.
That would just create the opposite problem. Sometimes players want to keep using their boosts and then they would have to go through several clicks each fight to re-add them. Perhaps something in options to remove or keep boosts after each fight would be good as well.