Evolve is a great game but there’s always room for improvement when budget expands after a well received release, notably in a design category close if not the same as PvP arena.
My sketch is this:
In an alternate game mode is to add objects in the early game other than the monster that hunters could focus on and vise versa in an attempt to thwart each other. A mechanics being Scrap salvaging, where the hunters would pick up wreckage from the ecosystem to help aid them in their struggle by using the Collectibles to help fortify their establishment. A slight comparison would be the sims, except instead of beds and lamps you would be building turrets, walls, bunkers, gear (you name it) with enough materials. This would force the monster to actively engage in direct confrontation with the hunters before the hunter became too strong (role reversal).
All aside Evolve is a completely original game and my hat goes off to the designers for getting as far as they did, feel free to add any constructive criticism or ideas that you would like to see…