i wouldn't make any moves, honestly. but if you really wanted to, i think i would try to move welker over smith though. since the bye week he's had 0 tds, and 4 of his last 5 games he's been held under 50 yards receiving as well. Gronk has really been taking over.
given that, there's bound to be someone out there who would still buy high on welker, and might be willing to part with a top notch RB for him (especially in a ppr league). you could even package him with one of your rbs to improve your chances of landing a top 5 rb too(i'd move forte over turner. he's slowing down, only has 4 tds, and he'll face more stacked boxes with cutler out) might even be able to grab a middle tier TE. but really, the different between the number 10 TE and Dickson is about 10 pts on the season, or a point per week.