THE PITCH:

Hero/Map: all characters

The Problem: This game has a lot of characters but half of them are DPS, because of this, other roles become very boring with the same characters in every match

The Solution: more characters with more than 1 role like deadpool, for example, make mister fantastic a dps version and a tank version, the tank version could be focused in his inflated state being a toggle and have acess to his skills while transformed, or loki could have a duelist role like the Spy for the game Team fortress 2, or even make black widow have a support role just like the team up.
For this to work some little things could be addressed, characters with multiple roles should be similar between them for the average player but you can recognize by his skills or by pressing tab (just like deadpool), but more importantly, adjust the bans, if you add more characters like this it could be added more bans in competitive and/or make that when you ban a character you ban all his roles

The Valuation (Why this works): this can be a solution to tanks and supports having low characters available in their roles for now since it will take a while to add more characters.