Upgrade or stay put?

I’m in a 2 QB league my team has been good but don’t know if i should try to upgrade or stay put, what do you guys think?

QBs Brady and Kyler
RBs Aaron Jones, Montgomery, Tyson, Henderson, and Murray
WRs Kupp Higgins Claypool Rondale Moore and Marshall Jr (Jeudy IR spot)
TE Higbee
Def Carolina

I was thinking maybe Henderson and Claypool for an RB upgrade but idk who to go after? Saquon? Najee?