I was thinking about coming back to league, definitely not now. Why change "solo" queue?
Casual was never all that fun. I disliked that 80% of games were ruined by matchmaking having premades. it's not fun when you have a 4 man premade shitting on you for every tiny mistake you make, and its not fun when you're losing because the other team has inherent advantages over your team with better communication tools. Premades made matchmaking less fun and less balanced.
Ranked was a nice safe haven for fun casual play. I knew that no matter what I would never have a 4 man premade yelling at me all game. I knew that in high silver/low gold I would never have to face people too far outside of my skill level. Ranked used to be a carefree no stress environment where you could just play the game.
But now there is no way to do that in league, so I don't see a reason why I would ever want to come back or why anyone would want to play the game.