There's only 15 games left before the TDL; so unless there are injuries or a "too good to pass up" deal to be made, I'd stay with the roster we currently have.
Unless necessary to afford Tkachuk's raise, I'd keep Frolik until next season's TDL.
Stone could well be traded this summer, as there is little sense in paying $3.5M for a bottom pairing D.
Many of us (myself included) believe that Bennett will up his game in the playoffs; but if he can't/doesn't, I'd look at trading him in a summer package deal.
Actually, I can't think of any of the Bottom 6 forwards that I wouldn't trade, just as long as the return was fair.