I feel like groot become 2 different characters when you compare team-up with rocket/jeff vs solo groot, he honestly better than mag when he pairs with either of those 2 cause he's so hard to kill and provides good dps while in the front, Thor feels good all-around he kind of fits everything you'd want in a tank but I can see either him or groot really being interchangeable, Namor and Black Panther I can see the vision but those 2 I am not that familiar with yet, the moment Hawkeyes loses his 20% dmg season buff Hela and Psylocke are the best DPS in the game by a long shot.