Wanted to have something you'd work up to getting, not just maintaining some hunger stat. There are still some survival aspects in that you interact with the wildlife, can only heal at carcasses for Carnivores, etc...
Another thing was I figured everyone would only go for the biggest and coolest dinosaur provided you didn't have to work up to it.
in the isle's survival gamemode u still have to work up to the big bois tho because no matter what you start out as a juvenile of whatever dino u chose
the major problem with progression was that in order to get to dinosaur Z, you had to first go through dinosaurs X and Y, even if you thought they were boring. For example to get to allosaurus, a medium-sized average speed therapod that focused on ambushing prey and letting it bleed out after a few bites, you had to first play through:
Velociraptor - a tiny almost useless scavenger (1 hour)
austroraptor - a human-sized raptor that hunts mainly in packs and can pounce on things (300 min)
utahraptor - austroraptor but bigger and better, and faster and relies on great speed to run down smaller prey (360 min)
FINALLY at allosaurus - has nothing in common with the dinosaurs you played to unlock it and is simply bigger
imagine having to play as scout, engineer, spy, or whatever before getting to play as heavy. Forcing players to play with things that offer completely different play-styles than what whey were going for is bad design.
In Survival however, you can permanently unlock ANY playable dinosaur and spawn as it whenever you like, but the catch is that you start out as a juvenile and have to grow up. But they still play the same was as the adult version does, so the player still gets to play the way they want to mostly (some juveniles are a little different, but not too many)