I don’t make many suggestions, but something I find myself doing is picking random heroes blindly and running them in pvp and in co-ops. I find it gives me a challenge and forces me to improvise with a team comp which may not always work, but one which forces me to manually pick a hero to pilot and go with.
Maybe a random team-selection button would be a nice feature to add, something which picks
your heroes randomly regardless of what role they fill. It could be discretely added next to the hero sorting feature, and be catered to old veterans like me wanting to spice up my matches, or trolling players looking to cause a bit of mayhem.