Not tedious? Hahahaha. Seriously, I feel like most of the people that praise MoP played only during the beginning of SoO or ToT and completely forgot the shitshow that was MoP's launch.
Class design was godly? Not really before ToT. And even then, some classes were iffy without gear.
The dungeons were horrible, they never added new ones and 2 were recycled.
You think MoP was an amazing expac, you're entitled to that opinion, but at least be objective. MoP had a ton of issues and tanked the subs really hard.