Ikr, I want Pandarens, Worgens, Kul Tirans, Lightforged Draeneis, Void Elves, Mechagnomes, Goblins, High Mountain Tauren, Mag'har Orcs, Nightborne, Vulperas, and Zandalari Trolls to be playable in WotLK. Not having them makes 0 sense. /s
Blood Elves and Draeneis are TBC thing, not vanilla. Same goes for DK's and WotLK.
Did you even read what you quoted? It seems you didn't. Talents will reflect the expansion.
RDF is QoL update, same as higher rates. If you want to crawl on 30 grit sandpaper to reach level 60 or dungeon entrances, go a head.