This is a bizarre POV.
An overweight 2nd rounder becomes a 2-time all star, and starter on a team that went to the finals.
His improvement, single-handedly made Bowie, who was finally playing and playing well, to be trade bait - which is how we got Buck in the first place. If Duck "sucked", then there is no Buck, and no trips to the finals.
Duck was a good midrange shooter, and was a serious threat with both hands - a skill few post players have, even today.
As for "weak links", they were all over. Outside of Porter, no one could shoot - and it showed. Double the length of the court, and they'd be NBA champs, maybe multiple times. Slow down the game as in the playoffs, and they weren't.