I recently mentioned that my new low-level warrior had done 3 dungeons in a row, gained 4 levels in the process, and outleveled all his quests. Apparently Blizzard noticed that as a problem too, and significantly lowered dungeon xp. I think that is a very good idea. I love dungeons, but people tend to react strongly to incentives, and if one type of content gives too good rewards, other types of content end up getting neglected.
What surprised me more was to see the new list of dungeon levels. For example Scholomance as a level 38 dungeon feels strange to me, I will need some time to get my head wrapped around the new order. But I must say the new list will probably work better with the Dungeon Finder. When I leveled my previous character, the druid, before the Shattering, the Dungeon Finder tended to land me in the same dungeon for many levels. The new list is more evenly spaced, and so offers more variety when you choose a "random" dungeon.
My only concern about the leveling process right now is that between the renovated Azeroth from 1-60 and the already very good Northrend at level 70-80 there is this really sub-standard level 60-70 experience of Outlands of the Burning Crusade. The last time I did it, I refused to quest and leveled exclusively through dungeons; but even that wasn't optimal, because the expansion has a lot of level 70 dungeons which I never saw through the random Dungeon Finder. So I hope that as part of the next expansion Blizzard renovates Outland as well, at least streamlining the dungeons there as they just did for Azeroth. And fix the "Satchel of Helpful Goods" for level 60-70, which is currently just giving junk rewards.