I doubt that there's any more motion on the "Glory" than any other ship. If there is, it's probably because of the port she sails out of. Sailing out of Port Canaveral, she may spend a bit more time in the Gulf Stream than some of the other ships, sailing out of other ports. The Gulf Stream crossing is almost always a little bit rough.
Don't worry about it though. Take some "Bonine" and have a great time.