looks like your in more of a big play (sacks & INTs 6pts) league. Timmons is more of a tackle heavy guys with slight sack/INT potential. I think he has more upside in your scoring system than Bishop so i might make that move.
I think i would stay put for now with Burnett. Landry is solid, but Burnett has proved thus far he is a solid tackle guy and has big play potential. if he starts to slide off and Landry is keeping his tackles up and shows he is getting after the QB then maybe drop Burnett, but until then i would stay with Burnett.
Thanks
Bill