Exactly. You just made my point - Dinoland has nothing to do with the rest of the park. The lushness of the Oasis and the excitement of animal sightings carries through Discovery Island, Africa, and Asia. The message of conservation starts from when you enter the park and recurs in Discovery Island, Africa, Rafiki's Planet Watch, Kali River Rapids, and Everest. Even Camp Minnie-Mickey has a theme (camping) that relates to living with nature and not destroying it.
Dino-Land is the odd land out, with a tacky, garish theme that detracts from the beautiful, lush theming throughout the rest of the park. Its theme of roadside America is devoid of living animals and basically represents corporate greed (both in terms of its two fictional frugal representatives - Chester and Hester - and its actual real-life history). If anything, Pandora will help to unify the park even further by fitting in with the majority of AK's lands.
And while you say "I like a little tacky now and then," Disney could do better. Just look at Hollywood Studios. Hollywood Studios is full of things that could be interpreted as tacky (Prime Time Cafe, Sci-Fi Dine-In, etc). And yet, I'd say DHS executed the "tacky" aspects perfectly. It makes sense, the theming is rich and detailed, and it doesn't look cheap in the end. With Dino-Rama, it's not just tacky in an intended way. It's tacky because it looks poorly designed and very very cheap.