I don't even get the "it's just a zoo" comments. Clearly, everyone else must have zoos way better than the ones here of they think AK is just a zoo. It's my favorite park, personally. It is a theme park, just like the other 3, only it's theme is animals. The vegetation is wonderful. DH was doing the "its a zoo" thing before we went, but he was floored by the plant life and scenery. His first reaction was "This isnot a zoo, it's a jungle!"
I love AKI'm sad so many people don't get it.
Though I will say, it is a slower paced park IMO. You can do it commando, but you'd be missing the point. It's a great place to towards the end of your vacation when you're winding down.
Disney seems to want to play up the "not a zoo" thing because on the television there, it's advertised as "nautazu" or something like that.