I know it is not a big deal, but it just annoys me that iguanodon and all of the similar creatures have double hand spikes. It only had one thumb spike, and it’s pinkie finger was separated from the others and used to grasp vegetation instead of being a second spike.
This is how it actually looked:
Also, a long time ago people wanted to add megaraptor into the game, which is perfectly fine.
This was the design:
However, if it is added in, it better have giant claws like it is supposed to.