Lone Wolves AND Premade "Pack"
I'll start by saying I think the new ranked system is a big change that will create a new set of problems for players. However, I also think no matter what ranked system is in place, there will always be toxicity, feeders, AFKers, harassers, etc.
It's undeniable the new ranked system offers a different experience. Players will still have fun games and players will still have frustrating games. Now you can share the experience with your friends.
I think these changes are great only if we can have a true solo Q game type. Like Lone Wolves in Halo, it allows you to boast you have more carry potential than others. This is a great tool for recruiting in the competitive scene because the high skilled players are easily to identify.
This game is centered around team coordination. When one member of your team is underperforming consistently, it is the team's interest to find a Lone Wolf to replace the weakest link. Solo Q can be utilized by teams to look for new members.
TL DR Solo Q should co exist with Duo Q / Team Q as a unique game type.