It depends on how long Baldwin IV lives..If he still dies relatively young, you still have the factional disputes during the reign of this child, assuming it's a boy. Baldwin IV having a healthy male heir may mean that Princess Sybilla never marries Guy of Lusignan or William of Montferrat. Both she and her sister Isabella become less important now. I suspect that Raymond of Tripoli will still be the regent for the son of Baldwin IV.