Red Claw being a brutal dictator does have appeal. Given what we've seen in the series, this would indicate that living conditions under his rule are appaling (perhaps not only due to him alone, but due to the state of the Mysterious Beyond as well) and Chomper's parents are under his rule as well, and not being able to escape it, they would send off their child to a better place. However, then there is the question of Ruby's parents. If they wanted their children to be safe, they wouldn't only send off Ruby, but her siblings as well.
This would indicate that Ruby's parents are not under Red Claw's direct rule and have an easier life than Chomper's parents. Perhaps Chomper was initially supposed to be sent off to Ruby's parents, but then Ruby's parents, seeing the effects of Red Claw's rule, decided to go a step further, and devised a plan to throw off Red Claw, and put the execution of the first part of their plan into the hands of their eldest child, by sending her off with Chomper to the Great Valley (to which Chomper's parents presumably agreed). This marks Ruby's parents as somewhat zealous about their cause, risking the wellbeing of their child to help out strangers.
The motivation and inclination of Ruby's parents is one of those aspects of LBT that require further exploration.
I still believe Chomper to be Red Claw's target, and not Ruby. Ruby would never have
dared to go see her parents if she were the one Red Claw was after, as she wouldn't want to put them in danger.
One possibility is that Chomper did something to tick off Red Claw, and he became a target. He knew that he was putting his parents in danger (one would have to assume that there are more bad guys with Red Claw than just Screech and Thud, but, given that he is so feared, one would presumably have to assume that anyway) and eventually got them to agree to let him stay with Ruby's family.
They snuck off in the middle of the night and Red Claw kept a watch on Chomper's parents. After some time, Red Claw realized that Chomper wasn't there and eventually figured out that he was with Ruby.
Chomper got wind that Red Claw was coming somehow and he told Ruby that they should head to the Great Valley. The scene that was shown in the flashback happened.
Perhaps Ruby went into the Great Valley first as Chomper might be attacked were he to go in himself, and got Littlefoot's attention. She introduced herself and told him about Chomper. Littlefoot was able to get Chomper in (he and the other members of the Gang of Five may well have told the grownups about Chomper sometime between when they were reunited with their parents near the end of V and when they returned to the Great Valley at the very end of V. Heck, maybe Elsie brought Chomper across and they even knew Chomper personally for all we know.) At any rate, Chomper got into the Great Valley and that may have thrown off Red Claw for a while, as he probably thought they'd never let a Sharptooth in there, but he eventually figured it out and is trying to get to Chomper and will harm anyone else that gets in the way.
Personally, as to Red Claw, I'd like to have him survive the TV Series. Perhaps they could have it look like he fell to his death or something (like the original villain appeared to have done during the Great Earthshake) but have Red Claw appear in the upcoming movies, still alive and angrier than ever.
As for other villains, I'd like to see a Sharptooth flyer villaness and even evil Longnecks perhaps.
As for them Sharptooth Flyers, that would be an interesting scenario. They can just fly over the Great Wall and pose threats to hatchlings and smaller dinosaurs and maybe even, if there are enough of them, bigger dinosaurs too.
As for other villains yet, perhaps Ozzy and Strut, who could turn out to have survived, and are mad at the Gang of Five and Chomper and his parents, could decide to try and aide Red Claw to get rid of them.
Another idea, doubt it will happen, is to form a sort of "League of Villains" where Ozzy, Strut, Dil, Ichy, Rinkus, Sierra, Red Claw, Screech, and Thud all team up to try and knock off the Gang of Five and Chomper and Ruby and possibly take over the Great Valley.
I also greatly want to know the back story of the Old One, which could be quite intriguing as there seems to be many dark things in here past, if one notices closely, even if she doesn't say most of them.
Personally, I'd like to see Littlefoot own Cera in a scuffle. She's always come out on top every time it happens. She needs to lose once for a change. It would be good for her. Perhaps she would respect Littlefoot more if that were to happen.
I'd also like to see Cera got more horns or a taller Ducky. She and Petrie are so similar in size, but, it might be nice to see what happens when she starts to get bigger than him, as we know she will, given the adult forms of their parents and Pterano. (Perhaps she could sing "Things are Better when You're Big!" Just Kidding!)
I'd also like to see someone who scares Topps. He's not even afraid of Chomper's father or Red Claw or Belly Draggers! It would be nice to see something that would make HIM scared.
I'd also like Cera to finally come to terms that it's ok to admit she's scared (perhaps she somewhat did at the end of the Hidden Runner episode.). She always acts like she's not scared, even when it is clear that she is. I think it would be good for her to conclude that it's OK to be scared and admit it.