Please let us queue with our friends in CC

[Gserpent]

...and if you can't get 4 others you end up against premades on voicechat.

Dang, maybe you should use your friends list, PF, discords, etc to work together with other players like they did then, huh? This is an MMO, any system that discourages or prevents players from engaging in multiplayer content with their friends should be very carefully examined, and should be adjusted to enable playing with friends if at all possible. Savage raiding has this problem, too, with the coffer system effectively punishing a player's less-skilled or less-dedicated friends for receiving help from more-experienced or more-dedicated friends.

Ranked will never have a large enough playerbase to support separate ranked and solo queues. Considering ranked is specifically for people who want to get sweaty, it should be only for PvP Teams. The matchmaking system will function quite a lot better when it's matching fixed 5-man teams against one another than individuals against other individuals, and you're a LOT more likely to develop relevant data for balance tweaking and design changes from formal 5v5 games than you are from randoms vs randoms.

Solo ranked is frankly wasting time. But it's still better for getting actually fun games than casual is, unfortunately. A possible solution might be adding hidden MMR to casual games - that way teams will have at least some attempts towards balancing them.