The talent respec guy is pretty much all trainers are for now. Leveling is FASTER, but half the fun of leveling my original druid in WoW was doing those class quests and traveling to Orgrimmar every five levels or so and feeling legitimately more powerful after visiting my trainer. Now I don't need to see them unless I want to respec (Vanish dust insta retalent is useful, I give it that) and leveling is so... Useless.
All those "speak to trainer to "practise" your level 3 ability are completely useless because you leveled to 3 halfway during your last quest and accidentally clicked it, using the fancy new spell and purty graphics.
I loved the tree, since I was still low level I was literally WoWed (I'm a terrible person
) by all of the different choices I could make when I got stronger. Leveling NOW feels like a different class, the trainers in the starting zones are just... Confusing with "you can only do this once your level 40, shoo we don't even have flavor text". And you learn spells much much slower, and you cant hope to level up and choose those cool looking talent-spells anymore because THEY DON'T EXIST.