Do you think Mina would be a much stronger character if she was allowed to use her acid on actual Villains?
As seen in season 7, Mina was able to melt through Gigantomachia's armor. (which almost no Pro-Hero was able to do) With that in mind Mina would be a real asset if she was able to do this with all Vilians.
As seen in season 7, Mina was able to melt through Gigantomachia's armor. (which almost no Pro-Hero was able to do) With that in mind Mina would be a real asset if she was able to do this with all Vilians.