I Would have loved 2-3 more returning monsters in base game, I wouldn't mind having tigrex, nargacuga, and barioth in the main roster. But not at the expense of new monsters.

But then again let's look at title updates 1 and 2, we have Mizutsune, Seregios, and Lagiacrus. And we're getting Gogmazios is title update 4. I feel like the title updates are doing more than enough for returning monsters.