Possibly the question should be "What if no Saladin?". I really would have difficulties in building an ATL where Saladin may have lost.
If it happens, I would not expect it would make a lot of differences for France. The Outremer was never a truly french possession. The regional lords were mostly acting on their own, and in any case a continued Outremer would have made a (positive) difference mostly for Byzantium, the Italian Republics and the Norman kingdom of Sicily