>It should be two lanes with one a protected right onto Centre St. that doesn’t have to stop. Make Centre turn two lanes so people coming around Washington St can make it also

I think that gets to the principal problem, but you's still get cross traffic of people coming off the ramp who want to continue straight, and people coming around the curve that want to take that right on to Centre street. The potential for a collision would still cause people to hesitate as the come off the exit, just like now.