I just think that would paper over the cracks of what is, frankly, a hollow experience.
I am NOT a fan of Vanilla and TBC. I think the class design and combat is dire in both iterations and the class design was not truly complete or fun until WOTLK.
However, what those versions of WoW had was a certain sense of danger when out in the open world. You’d encounter bumps in difficulty that you’d need to gear up to overcome, you’d have to think about pulls. Levelling felt a bit more of an accomplishment.
In WOTLK it feels like nothing more than a time gate. You cannot possibly screw up unless you try to. There is no danger.
My Paladin is 70, same as you. He is just in quest blues and greens, nothing special. Nothing outside of group quest elites puts up even the slightest bit of resistance. No thought is required at all. I don’t need to enter a dungeon to get some gear to brute force past a particularly troublesome quest, I don’t need to ever worry about pulling too many mobs. I am a complete wrecking ball and that’s fine if that the end point. It becomes a big problem when this is the baseline you start out from.
The whole experience just feels insignificant and that wouldn’t change with an exp buff, in my view.