Yeah, Pierce would be awful as a starting SG. He was never very quick, and at this point he relies more on vet savvy, length, height, and strength to win his matchups. Against SGs he'd get absolutely roasted. He's just not fast enough, and he can't, nor should, be running around screens all game chasing down shooters.
We need to resign Dooling and Pietrus. Both are fantastic lockerroom guys who know their roles, what to do, and are willing to sacrifice for the good of the team. Both play good defense and stretch the floor as well.