You guys say that things take too long, and are too slow.
Warmode + Random BG + Dungeons, I'm 87 in less than 2 days played... on a mage (and fishing achives, dailies, AFK and Darkmoon dailies counts here too). I seriously feel like I zoom through levels especially after they fixed things since pre-patch. Longest stretch for me was 1 to 15 really.
I can round up 8 mobs and melt them down in no time, and go on to rinse and repeat, dungeons goes fast again and give nice xp, BG's too.
Surely we do not want to go back to oneshotting everything in sight, and loose players because things is too easy.
Leveling is slow that is a fact, now i will assume that when you replied to forum you leveled many alts through many expansions and aware of leveling speed before and after 7.3.5 patch but let me put in numbers for everyone from my experience.
Before 7.3.5 in my peak moments i was leveling an alt in 20-25 hours played now this may differ from player to player since i leveld through questing only i never skipped levels through dungeons or bgs.
Lets fix this in 24 hour played, with 4 hour gameplay everyday (which is optimal for adults while teenagers can play up to 14 hours a day im counting them out)
with 4 hours a day it takes 6 days to reach max level before 7.3.5
As you pointed out leveling these days with full exp buffs tooks around 80-90 hours again may differ depending on your play style, but, lets fix this at 80 hours, again with a playstyle of 4 hours a day you can reach max level in 20 days, you see difference is way too big considering this is a matter for leveling alts.
we can assume this time increase by half because of the removed exp bonuses, for new players, which increases time to 120 hours. With optimal play time one person can reach max level in 30 days,
Now you can say "then play more hours each day if you want fast levels" which eliminates the idea of exp buffs where you need them so you can play this game in reasonable times each day while you still continue your everday life.
You can say "if wow is that important for you you would play 10 hours a day", remember this is for leveling alts, people who elvel alts play this game with their mains too and most of the times they split their gametime between many characters so 4 hours for leveling an alt is long enough.
Overall, is leveling slow in wow: Definitely
Leveling in Wow right now is the slowest leveling experinece you can have in any mmorpg, since i play a bunch of these i can prepare statistics for them too if you require.