Started on a new server and went through the trike tame to start the utility farming. Next day got an iguanadon and explored how it is used and what it can do. 5 minutes later I retired the trike to the egg farm.
The iguanadon is a great ground transportation, berry farming, small Dino killing, maneuverable and an overall great Dino. Jump off a cliff, no damage. Need to chase something to tranquil it, pull out your weapon and shoot while you ride. IMO level weight and speed and you've got a great utility ride!
Great for then swamps, reasonable jump height and swimming speed make great leech hunters. You can use them to lure leeches out of the swamp and then barrel roll them with a pteranadon. They are also good in swamps because they can harvest berries, good for getting plant species X seeds.
Since the flyer nerf v1 (don't know about v2) these are probably one of the best ways to get around the island. On four legs, these things are probably faster than anything that's not a Gallimimus, and they have no stamina drain, if not it drains very slowly. On two legs they have a decent jump, but no matter what they have decent weight, health, and ok damage. And since their saddle is cheap and low level, they can be used very early in the game.