Nothing seems to have changed to be honest, except for the number of items that are available on the Auction House maybe.
I never turn off Warmode, which means I am usually thrown into random WM shards so it’s not like I am seeing more players around me compared to how it was before.
Alterac Mountains / Balnazzar / Gorgonnash / The Forgotten Coast / Warsong was a Horde dominated server whose Horde vs Alliance ratio was 1 : 0.23 with ZERO 12/12 M guild. (one guild finally got CE less than a week ago).
Anvilmar / Undermine was an Alliance heavy server whose Horde vs Alliance ratio was 0.42 : 1 with just ONE CE guild.
The rest of the 12 guilds on this server with all 7 realms combined that has ever attempted Mythic raiding are all below 5/12. As you can tell, with such mediocre raid progression and the guilds having difficulty recruiting raiders, our server is never going to strive.
So yes, if you were an Alliance player on Alterac Mountains + 4 cluster before the recent connection, your life is maybe slightly better now with more Alliance players to play with and more progression focused guilds to join on Anvilmar and Undermine.
If you were a Horde player on any of these 7 servers? I don’t think there’s much of a difference, because we all know already that connecting dead server clusters with dead server clusters isn’t going to solve anything except for maybe making the Auction House economy slightly “better”.