I don't feel Durant would get sucked into hero ball with a PG like Wall. Push comes to shove, Westbrook will try to do it himself, and there's really not much else Durant can do since he's the only other consistent scoring threat on the team.
His role would be clear: Get open so Wall can find you.
That franchise is too cheap to maintain the talent level needed to come out the West and win a ring. Durant has got to figure that out for himself before its too late.