I would have remade film V to make it so that at first, the plated guy would go away and it would look like the end of the Gang of Five. Chomper would interpose himself like Pocahantus did with John Smith and eventually his parents would get the point and agree not to eat the kids.
Littlefoot would point out to Cera that they now had proof that Chomper wouldn't betray them. Then, Plated Guy would come back sneakily and almost get them but the parents would intervene, the fight would happen as before, and you know the rest.
Also, I would have redone film VI to have Littlefoot help Doc out for a change and also made Dana and Dina do something helpful so that at least they could be said to have been beneficial instead of pain in the necks. Also, I might have had some fun with Dana and Dina and at first had them appear to have been nabbed by the Sharptooth and Cera have to come back and say that they kinda died and have Topps cry (I never really see him cry. I think he did it
once , can't recall where, but he did.) It would have made Topps appear more likable to see him saddened instead of so calloused. Of course, D&D would then come back and Topps would be so happy that he'd forget to punish Cera for losing them.
As for film VII, I would have had Pterano save both Ducky and Petrie and be allowed back in right away so he could be a sort of father to Petrie (poor Petrie is the only one that doesn't have a man in his life. Littlefoot has Grandpa Longneck and, at times, Bron, and Cera has Topps, Ducky and Spike have Ducky's father (even if he's not shown really), Chomper has his father and Ruby has hers, but Petrie has no man in his life and they just sent the only guy that seemed to fit that role away back into the Mysterious Beyond.
)
Yeah, Pterano might not be the best role model for Petrie, but, then again, we all have issues with Cera's dad too and Bron has a lot to be desired and even Chomper's father could, perhaps, be more understanding of his son and his...er....unconventional ways. Ducky's father could be around more often so we could find out what he's like (he must be really shy!). Also, Grandpa Longneck buried a Sharptooth
alive so even he is no saint. (Speaking of that, I'd have had those Sharpteeth in film VI killed in an outright fight (i.e. self-defense). The way the film did it seemed more like, well,
murder .