If you have strong guards i wouldnt worry, id be extremely happy. IF they have decent handlings and youll be runing inside tactic. They will be taking alot of mid range jumpers without competition. Iv tried to run fcp few times, and even if my defences are really good for the division i am in, i get outscored by 6k salary guards shooting over 50%
On the other hand you still get like 30 steals a game, so this compensates the lack of reboundin in the team. Its maybe better to let guys shot 55% than shoot 45 and repeat their shots more often.