I am not sure its indisputable at all. Kenny Williams made a grand total of one 3 pointer all last season, and Robinson hasnt even put on a college uniform in a real game yet. Add to that the fact that Theos shot was looking and reported to be much improved, I would say its highly disputable. What I can say is the team in general is very much weaker without Theo, I think thats pretty clear.
Also, why are you just assuming its williams or robinson that slides into the starting spot? Nate Britts shot and game looked well above both of them in the scrimmage,especially kennys, plus hes a proven senior.