I just had an epiphany about why SoloQ Is probably never returning.
With Dynamic Queue, It is not only easier to balance Pro play, but team play in general.
Before Dynamic Q the developers would struggle to balance one game with several play modes varying between Solo/Duo Q, Ranked 5's, and Pro play.
So by merging Ranked 5's with Solo/Duo and adding Tri/Quad Que, it changed the entire game "Dynamic" to a more universal style, which is easier to balance, especially for full team 5v5's with voice communication.
Riot has already and continues to balance the game around full teams of 5v5 with VC, so in order words the mechanics and stats of various champ ability's, items, environment and much more have changed to better fit that Type of competition.
Hurts to say but Im finally convinced SoloQ is ancient history, and that I need to find some friends who play league if I ever want to progress again.