Both areas sound somewhat interesting in their own ways - the goblins more than the worgen mainly because they get more toys and generally have more fun from the sound of things whereas the Gilneas area's attempting to be all serious and moody (never WoW's strong point) - but it doesn't tempt me to return.
Why not?
Because these are just starting areas. The rest of the game would be unchanged. Oh, yes, geographically it will be altered to a considerable degree, using flying mounts everywhere will be extremely convenient and the quest chains will doubtless be altered to suit the new landscape, but as Moriarty pointed out above, the mechanics all sound the same. Beyond the new races' start points it will all blend together into the same grind regardless of race/class and before long it feels like nothing's changed at all, I'm certain of it.
Hell, once you hit 58 and go to Outland nothing will be changed at all. There's no cataclysm out there, right? And did the disaster reach as far as Northrend or is that content to 70 (and beyond, really - I hit 70 long before I finished Icecrown's quests and I hadn't even started on the mountain area east of it yet, that's another two levels easy I'd bet if you kept at it there) all untouched as well?
Nah. I can see why some folks are interested enough in the new material to resubscribe to try it out, but I'd bet for most of those it will only last a few months, if that. People new to the game will likely find a lot to keep them interested, but for those who left because the game just started feeling stale...I don't see anything in the expansion details to change that yet.
Don't sweat it, Steve. A visual aid might've conveyed some of the details better than a simple write-up, but it doesn't sound like you left anything important out. I can't imagine a video would have "saved" the review from making the area sound more familiar than the goblins' explosive craziness did. Can't help the way it's made.