Trade advice - Sony for K. Allen?

Im in a 10 team standard score league (auction) and doing pretty well, 7-2 in first looking for a championship. Trying to ensure that with possibly trading sony away bc I’m a little bit concerned with him down the stretch with rex coming back. Here is my team:

QB: Mahomes
RB: Gurley
RB: Gordon
WR: Woods
WR: Boyd
Flex: Sony

Bench: MVS, Fitz, Eckler, Ridely, Sutton

My question is should I trade away Sony and Ridely to get Keenan Allen and Tarik Cohen? This would mean basically starting Allen in the flex over Sony ROS but also a backup rb in cohen. Good trade? I just love Sony having drafting him but am a little scared of the possible Patriots RBBC down the stretch for the fantasy playoffs. All thoughts welcomed, thanks!

I traded Sony for Allen the week before he was injured and I’m happy with it. .5 ppr