Where did it say that Don Bluth hated the sequels? I never seen any comment from that guy about hating the LBT sequels.
As for MarzGurl, I never watched her reviews, but I kind of just shrug. I wouldn't say she's a "disser"; I try not to use that word. I just think she's someone who loved the original and just didn't like where the sequels went, and that's understandable. LBT went from a pretty serious and somewhat gritty survival story into a musical of singing dinosaurs. Sure there's still danger, but it was more toned down and child friendly. I can see why some people may not like this.
My brother and I have thought of reviewing the LBT movies as well, but that was before MarzGurl beat us to the punch. We might still do it sometime, but we don't know when.