Well, Treverrow said that he didn't want to keep throwing familiar characters back into familiar situations. I'm happy to see B.D. Wong though. And I recall a poll on JPLegacy about JW's casting... the one that got the highest number of votes was the Cardboard Cutout of Ian Malcolm. :lol
Personally, I can see why a lot of fans dislike the third movie. However, I like it. Maybe not Rexy getting beat by the Spino, but I loved the addition of new animals in the canon. Plus it pretty much confirmed version numbers in the films with the raptors.

EDIT- Just found [url=http://img1.wikia.nocookie.net/__cb20141124052547/jurassicpark/images/9/9d/10693540_363902177103084_1862794702_n.jpg]this[/url] on the wiki. Seems legit, but that's just me. We were told about the Mosasaur feeding shows, but this looks cool.