He's been quite good to be honest. He has ongoing injury problems however, inevitably that affects his form. Also, the fact that Remi Garde prefers playing a 4-2-3-1, kinda hurts Lisandro sometimes, as he's forced to play on the left flank with Gomis as the main striker.
He does seem to have lost a little sharpness and a yard of pace too(because of his niggling injuries most probably)