OK, I noticed that starting with 7 the animation quality dropped startlingly...the colors were brighter, the tone was brighter, and it all felt more kiddish. OK, so the colors had felt a little too bright ever since 5, but it was with 7 that the the problems really started to stand out. Starting with 7, all background dinosaurs suddenly were allowed to be every color of the rainbow---take the green one-horn for instance. Definitely don't recall seeing him as an extra before 7.
But it's the longnecks in 10 who suffer the worst, with the exception of the Grandma, Grandpa, Bron, Pat and Sue---the
important ones---all longnecks are drawn really cheaply. Here are 2 screenshots to prove it:


Notice how Bron stands out in the crowd!
Someone even pointed out that at one point an
iguanodon can be seen.
An iguanodon. That's how much thought they put into drawing the longnecks in 10!
Oh, and guess what I had to type up for the last pic I uploaded?
Yellow-belly! I'm serious!!