This was something I was asking for, too:
https://us.forums.blizzard.com/en/wow/t/somechanges-huh/877410
And, you (specifically) mentioned it was something that was already in BC, and I thanked you 
See? We’re a lot more alike, than we realize
But, yes. I’m definitely in agreement and totally down with the LFG Listing.
One thing I wanted to say, though. You mentioned early Wrath…I don’t think that’s going to happen. IK and understand Late Wrath was when LFD happened…I think LFD is going to be in Wrath Servers…I really WANT to be wrong on this! 
Agreed…with the LFG Listing
EDIT:
I’d like to add that I do agree, it’ll be difficult to get “level appropriate” groups, together on PvP Servers. With all that Ganking, I can see why Boosting is a more common thing on those Servers than PvE ones.
With the Booster, they can at least, be your body guard. A “normal” dungeon group? LOL gg 