A remodel isn't needed, it just needs to hold it's neck lower. Same with Dreadnoughtus.
I’ve seen people talking about this quite a bit so here to give my support for this. A mamenchi remodel is highly requested. I also want to say that Spinosaurus and Acro need remodeled and replaced too. Like don’t keep the old Acro model in the game, just switch it with a better designed one.