I was on the Symphony pre-pandemic, and the best bit of advice I can offer is to have some patience, especially when it comes to the elevators. With reduced capacity it might not be as big of an issue, but we often had to wait forever for them. The crew was wonderful, there was ALWAYS something to do, the shows were amazing, and if you can get away to the adults-only pool/solarium area, I highly recommend it for some quiet time. Especially if it's a port day that you don't plan on disembarking. We practically had the whole area to ourselves, it was absolutely lovely and peaceful.