Dynasty - Rebuild after championship? (1 Viewer)

Happily I won a couple of leagues last season, one of which with a very "win now" roster. In fact, its a bit of miracle I did win, that monster Davante Adams Week 16 performance pipping a much stronger opponent to the post. 

So, what to do now with a rather ageing team? I wondered whether a rebuild approach is a better alternative. 

Here's a quick breakdown of the roster. Its SuperFlex and TE Premium (1.5 PPR)

QB: Wentz, Roethlisberger, Brees, Brissett, Love

RB: Jacobs, Gurley, Hyde, Coleman, Michel

WR: Adams, Cooper, Woods, Higgins, Hilton, Corey Davis, Agholor

TE: Kelce, Hockenson, Gronk

(Some scrubs, kickers and D/ST that don't really have relevancy to the conversation) 

I suspect I could sneak into the playoffs again but a repeat seems unlikely, what with Brees retiring and Gurley holding minimal value moving forward. Is it best to cash in on guys like Kelce and Adams now while they still hold top tier value?

Thanks in advance. 

I wouldn't give them away but I wouldn't be afraid to move them either.  If the right offer comes in then move them