The rematch should happen as the fight is very close.
+1 here , the fight really amazing and the decision is tough to provide so i think rematch must take place and if Garaballo win then the decision fight must happen for finalization.
Give Caraballo a chance and break his chin again, I think Sultan will not make a new strategy, he will continue to use his style which is to go for the chain, put some pressure on the opponent, and if he can take him down again, he will win with no doublt.
i doubt it, of course sultan will use different approach if rematch happens.
Let's hope to hear some update regarding the rematch, or a possible big fight where Sultan will be a challenger to the champion.
This will take time , maybe next year or the next .