Nope. United changed my ewr - gcm flight 1 hour earlier which caused the longer layover. Of course when we check in after arrival the first thing we will see is if they have any openings on the earlier flight.
When do you travel? They may change your flights several more times before you depart! I try not to worry about it too much until we get closer to the departure date!
I can understand that you want to get to Brac as quickly as possible to stop traveling and start relaxing, but if you are staying at the Cayman Brac Beach Resort then keep in mind that their meal plan starts with dinner on the day of arrival - so you will have to buy lunch somewhere - so it may as well be a nice lunch in a lovely setting like the GTYC.
I think that the food at the CBBR is very good, but I have always felt that the lunches are their weakest link. If we arrive at the CBBR early we usually just get a hamburger at the beach bar, because they charge a lot for an extra dining room meal and their lunch offerings are not always worth it IMO.