It does. At least in the preview it does… if it’s not doing this on the current Beta iteration that sounds like a bug that absolutely should be addressed before release. From what I can see here any role should have an easy time seeing what groups need.
Probably not. Retail works the same way and nobody lists as a solo looking for a group. You either join an existing group, or start a new one. That’s it. It’ll take a bit for people to adapt, but I suspect they’ll figure it out soon enough.
There’s no call to arms for M+. I think you’ve worked yourself up to believing that dual spec doesn’t matter, but it actually helps a ton. You can continue to worry if you want to, I won’t get in your way, but you’ll see 