beal still can't and won't play defense. to get beal, the celtics would probably have to unload horford, who is a good defensive player. boston's highly touted switch-defense would be greatly diminished. beal would hands down the worst defender in boston's top 7 man rotation, it would not even be close.
next, beal is too similar to kemba walker for me to think he would work here. yes, beal is (was?) better and still is younger than walker, but he also still a volume scorer with poor defense and has questions about his health.
last year his 3 point shooting declined to 30%. Maybe that is simply a down year...maybe. but in the 3 years prior he shot 3 pointers in the 35% range, which is a little bit above league average.
also, he is due to be paid around $36,000,00 per year.
i think beal is a great offensive guard, but i don't think he would fit well with what makes the celtics a potential winner next year.