I know I was just using that as an example, but I pointed out the large amount of dinosaurs they would need to change. I mean look, they even originally said they could NOT (or would not) change the sizes on just a few (giga, spino).
But they aren't going to spend the time to do this stuff, it doesn't even fit in with the system which is why they had decided to make all the armored dinosaurs near the same size to each other. It is for the battle purposes as OP noted.
Like I said, I am one of the people who would very much like that to be done, but they've pleased the majority already with the size changes that were implemented.
Can we just throw the whole combat system away? Would anyone really care... ?
I honestly wouldn't, but...
Since this game is still in "early on-going development" mode, my concern is that as more time goes on and more stuff potentially gets implemented, there may be a point-of-no-return that would make a re-size overhaul impossible. I would say, get it out of the way as soon as possible and then re-work and fine-tune the systems and design around it going forward.
... or, just remove most of the species that aren't even close to accurate size from the game entirely, then we can all see that the game doesn't support as dynamic a roster as it leads many to believe.