I can't see how giving Janish more starts at SS would hurt. Cabrera is a net negative at the moment providing poor defense and offense. Janish would provide good defense at least. Hopefully he could at least match the paltry .628 OPS Cabrera has put up. Put him out there and see.
LF? A little tougher since none of the candidates are hitting much. Maybe give Nix the starts against RHP for awhile. Much better defense than Gomes anyway.