@XxColdFangxX It boils down to more than just a team-based game. You have legend abilities that would stand no chance against a legend who could be tailored for solo. A lot of abilities would not hold a lot of value and some utterly useless.
Then comes the solo matchmaking. If you are put into hard lobbies in trios people above someone's play skill levels then expect solo to give the same outcome. People will still be facing insanely good players who stand no chance. So even if it was to be released I could see a ton of issues rising up with people expecting to be put in a more slow pace game. In reality, solo mode would create kill-chase challenges. Making a lot of peoples play experience horrible.