We need solo. Seriously.

"No one forced you to play this game.  It was designed for squads.

Solos would be a mess and lead to ppl complaining about hero balance issues."

Like no one would force anyone to play solo. I do not know what toxic people like you think that they have the right to decide how others should play.
In a team game, people also complain and will always complain about the lack of balance. just create a new game mode with characters without skills.
If the solo game option appeared in the game, nobody would lose it. On the contrary, the game would gain an additional mode and in this way could attract more players.

Actualy people like you are TOXIC evem more than Caustic gases.
I suggest that people like you do not speak, because they have nothing meaningful or wise to say, except for spreading some stinking dictatorship of their little minds.