The community is really, really split on this. Some say Blizzard has gone too far, some say they haven't gone far enough. Personally, I'm in that second half... conditionally. You see, I have four level 70 characters, coming up on five. I like to have a variety of top level characters, just so I have some feel of how they play or I can help my friends out if they need it. I can supply a tank, a healer, DPS with CC, DPS without CC, et cetera. Leveling is by no means hard, I don't think I ever put active effort into any of them past my first. It's very easy.
However, it is boring after the first time. Boring boring boring. While I adore the old world, it is very linear. There is a little overlap in zones, but the path you take is pretty much the same each time. This is mixed up a little in Outland as the zones overlap better once you're done with early Hellfire Peninsula and Zangarmarsh. You can branch out into the other zones if you'd like, and you're not punished with exceedingly long travel times anymore.
I want to skip Azeroth. I love it, but I don't want to grind through it anymore. I don't think that the lowbie leveling process even contributes to learning your class. You don't really know what you're doing until you're closer to the level cap. I would really really like it if you could just start at Outland and work from there.
That may be a little extreme, but hey, I'd love it. How about you guys? Do you hate how quick leveling has become? Love it? Should it be faster still? Do you have any better ideas as to how to make leveling alts more fun?