Bring back old Solo Queue just like it was and keep Dynamic Queue just as it is.

Have dynamic Queue stay as the replacement for ranked teams, groups of 3 or more will be able to play ranked on this and the people who specifically only want to do one of 2 positions ever will have this as an option.

That is all you have to do riot. The people who like Dynamic Que will still have dynamic Queue but a higher chance of getting matched with groups of 3 or 4 when going solo in it while having some kinda of incentive to go solo in dynamic when only wanting to play top or mid.

The people who want solo Queue will be able to pick solo queue. This is what I want since my champ roster has been adapted to solo queue over the years. It allows me to often play top but my backup position of support is not a prison of always being support.

If it proves to be a problem with people hating to feel like having to play one or the other all the time make both have wins and losses counts on the same overall rank. You are a plat 3 for both instead of plat 1 in solo and silver 4 in dynamic. (they will have separated win/loss counters and a total win/loss count but in turn both will count towards the players final rank in the season.)

IF one proves to completely kill off one of the queues then we know which one the player base really prefers and it will not interrupt the overall ability to play ranked this season and adaptions will be able to be made for next season.