A lot of Mets fans have written Kirk off but I really think this player can be something if he's just given a chance to be a regular starter, which he will get now. I think he should leadoff and play CF regularly against right handed pitching. Drop Tejada to the 8th spot.
Another thing is, move him to CF and let him stay there every day. Don't move him to left one game, right the next. Players need to get into a stable rhythm by having a regular role.