This should be a general discussion / quests & achievements thread, not Argent Dawn’s one to be fair. 
Or at least something for the pet peeve thread to ramble about.
But no, rare timers are very much here to stay. They haven’t changed them for older zones at all, bar a few exceptions (like the Poseidus nerf).
It’s honestly bizarre to me that since Legion they’ve become generic respawn 3 min mobs with a slightly bigger HP pool. It’s in the name - rare. They shouldn’t respawn so fast.
You should consider trying to turn Warmode on / off if you’re looking to find rares, since these two are separate.