Were you around before the dungeon finder? I was, and honestly it wasn't enjoyable. So lets talk about that, shall we?
Leveling dungeons were completely worthless. You could maybe sometimes find a run for SM or Maraudon, and sometimes Sunken Temple for the class quests once they added those in. Most of the time though it was a real hassle to actually get to a dungeon so people just said whatever and skipped them. There were efficient ways to level, there are still more efficient ways to level than what Blizzard intends. So you hit a point where you're in the right level range for an instance ... but you're on the other side of the world from that instance. You could go sit around and wait for a group, questing inefficiently in the zone around it and hope for some gear upgrades IF you get into a run, orrrrrrrr you could just keep questing efficiently.
Ever run to an instance?
Like .. actually run to one? I have. Back in Vanilla. And it sucked. Flying to the closest flightpath near to Dire Maul (for Alliance) or RFD/RFK and then hoofing it to the instance sometimes took longer than the instance itself. It wasn't fun.
Finding groups in BC wasn't fun either. Two of my top 5 favorite 5-mans of all time were in BC, but actually putting a group together and getting everyone there? Sucked. A lot. Spend anywhere between 15 and 45 minutes putting a group together, then people went "oh no summon, lols" and left. Or while people were running to the stone to summon someone would change their mind and leave.
Do you know what we did in Vanilla? We sat in Orgrimmar / Ironforge 90% of the time.
Do you know what we did in BC? We sat in Shattrath 90% of the time.
Do you know what we did in WLK? We sat in Dalaran / Stormwind / Orgrimmar 90% of the time.
And so on.
Creating a world and then forcing people to see it by imposing arbitrary restrictions on it is bad design. If you create a world and want people to see it, make it more appealing. I don't even know if they can do that.
They haven't gotten people to be out in the world in large numbers since Vanilla WoW, with the exception of quest hubs that gave large rewards or shiny mounts. Taking a few dozen steps backwards and imposing weird limitations on players isn't going to change that.
As for having to go to BG entrances to queue ... We did that for a huge chunk of Vanilla WoW, actually ... It didn't really make World PvP happen, because there were guards. There are always guards. We original PvPers who were ganking people when this new generation of MMO players weren't even born yet, asked for no guards and we got told "lolno." - World PvP isn't coming back. There's a huge disconnect between PvPers and Blizzard. But I read the entirety of Lord of the Rings while sitting outside of WSG and waiting in the queue between matches. Yes, really. It wasn't the most exciting experience of my life.