You know what, i would be fine with that, infact, that’s actually better then my suggestion. 
The problem?.. Somebody will say “This will take resources away and—” Etc, etc, etc, pretty much just shooting it down because they assumed Blizzard wouldn’t want to make it… not realizing ANY of the suggestions would assume Blizzard would want to do them in the first place.
Too easy? I actually think 60-70 is a slog.
I love AV. my absolute favorite. Bring back AV as legit leveling please.
That’s how my one and only attempt in hardcore ended (the cave by orgrimmar)
It’s a bit lengthy but the mobs still don’t ever pose the threat of killing you
If leveling is too easy for you just do it in the base white/gray items you get upon creating a new character and see how that goes for you.
I feel like people can get creative if they wanted to.
No thank you. I love that I can level a toon from 1-70 in a few hours. I go log into classic and I hate it. I also really only care about the endgame, so I am biased.
Wow doesn’t really begin until you hit endgame.
All this would do is make people quit…Classic servers already exist and even there, they put out leveling buffs from time to time so people will level alts.
Leveling hasn’t really been relevant since the game was new, and shiny. They would have to make a brand new game or do another revamp to make it somewhat interesting again. The been there and done that a gazillion times thing. Killing zebras in the Barrens for rng hooves for the 10th time is not exactly exciting or new. And making them harder to kill won’t change that. Some posters suggested a difficulty slider which isn’t a bad idea imo for the folks who are into punishing themselves lol. Got my nostalgia fix for old time leveling playing classic for a couple weeks. Don’t miss it one bit.
I think if you already have one toon at 70, any new character you start should have the option to begin at level 10. I always play healers and I prefer to dungeon queue my way to 70. 
Leveling is pretty boring, and imo, should be quicker.