Derailing the regular sigafoo drama to say
Daffodil-If you remove restrictions from the competitive ruleset the game stops looking anything like traditional competitive formats. Double medic in a game of 6v6 decreases your damage output by 20% in return for double heals, more ubers, and the ability to have 225 HP medics with scout speed. It boggles my mind that froyo didn't look at double med and instantly want to use it, but whatever. Its great, you just have to change some fundemental assumptions about the game. Everyone's life instantly becomes much more important and it turns the game into a numbers game instead of ubers game. Losing one combat class can put your team into a 3v5 in terms of damage potential if the other team isnt mirroring your composition, which can be further exacerbated if you have a class poorly suited to fighting as well (spy, sniper, baby enginner if his buildings die). Ubers stop mattering as much because tracking gets more complicated for a variety of reasons, and you can kinda outheal the damage while kiting if you do it right. Feeding on a combat class generally starts mattering a lot more, and 2019 style soldiers die for their scouts to win tf2 doesn't work (as well, at the very least). Deathball is meta.
Daffodil-Deathball is meta.
You just described one of the major issues with Overwatch.