Nobody will deny that Vanilla isn't perfect, but neither is modern WoW. Sure you don't have those issues, but you bring up lots of new ones.
PVP- are Ret Paladins still not brought to RBG's? Nothing like trying to PvP as a dps spec that everyone still hates to have around.
Raid - While I don't have to heal in a modern raid, I do have to deal with LFR, Normal, Heroic, and now Mythic. WTF?
Four, that's four versions of the same raid.
Dungeons - No longer a gateway to raids, cause everyone just AOE spams their way through. And again, multiple difficulties.
Quests - I hate repeatable quests cause it wasn't fun the first time, and there's not much difference between Vanilla and modern WoW except today I could pull a group and not die. You can solo every quest today without ever needing to group up.
Professions - Was the best in TBC where you'd get a unique perk. WoD was just using them as a way to do Garrison crap that's essentially farming.
Oh hey, modern WoW sucks too, just differently. Some people just think Vanilla had less suck.
As someone who's played Ret since Vanilla, I can assure you that the community would still rather have us heal, and considering the talent changes, so does Blizzard. Here's a famous Ret Paladin video before TBC was released, where we finally got Crusader Strike.
Give me this Vanilla, cause it was the best Vanilla.
Hello, I am the ret.
I am the Retribution Paladin, maybe you have heard of me??
I am the one who is not playing WoW 7.0.
Or sometimes also, the Legion - but that is hard, because several people do not like it when I do that.
Sometimes I am said to "Hey yous, you ret. Stop playing pirate servers"
I el oh el at this notion - and substitute my own. Often times my server hunting has gotten me trouble