It's something that comes up a lot, we hear this in PvP also - people who wish there were some kind of rated solo queue system. The approach that we've taken so far and I think we continue to focus on is to try to make it easier to find people of a similar skill level, with similar interests to do this content. We think there's a lot more that we can do with the group finder, and even just making it easier to without addons to see their rating and experience of people who you're grouping with will help, but ideally you should also search more easily for specific dungeons, difficulty levels, to specify whether you want just to complete the dungeon, or whether you want to push the key higher, and what type of group you're looking for .I think all of these factors can help people find each other more easily. The big concern with matchmaking is that WoW is, unlike a lot of other games that have matchmaking, where in Overwatch and in a MOBA like League, you might play different champions, different heroes. In wow you are your class, and that's not something you can change, and composition matters tremendously for group success. So if we randomly match you with teammates that don't seem like a good combination of classes or who you would prefer, I don't know that that's going to be the most fun experience, and so we prefer to give players control over who they group with, but we also want to make it easier for them to find friends and companions.
We're talked about the design previously, the general intent being that the gameplay experience is intended to be for groups that form prior to queueing together. That said, I think that something that the community feels really passionate about is something that we want to continue hearing from people about and it's something that we should continue having a discussion on.