QB Playoff questions

Is Cousins worth switching for Big Ben? I also have Rivers. Looking ahead to playoffs, kind of.

Next 3 weeks:
Cousins vs Bears, GB, NE
Ben vs Jacksonville, Denver, LAC

The benefit of doing this:
Week 14 - Rivers vs Bengals
Week 15 - Rivers vs KC
Week 16 - Ben vs Saints

But how do those weeks 11-12-13 look? Is Ben worth the switch?

I guess I’m also wondering what the value is of stashing playoff QBs from now.