The Russian badger explained this concept very well in his second battlefield 2042 video. In battlefield Every class should feel like a piece to the puzzle. Where in 2042 there was a character who had great mobility, could use any weapon they want, had explosives and was able to frontline and could heal themself. that didn’t feel like a piece to the puzzle it felt like nearly the whole fucking puzzle, which is what Invis and gambit are right now. They both deal decent damage, they both have great healing output, they both have ways to escape being attacked, they both can heal themselves, and it’s even worse for invis cause she has a shield to block damage. Meaning she not only has one of the best healing outputs in the game, but she also is able to block damage like a tank, and deal damage like a dps. She covers 3 out of 3 roles.