We did without the hopper option once and won't ever do it again. However, like OP said, we like to start the day in one park and end it in another. I like the option of walking into MK and deciding its way too crowded for us and hopping the Monorail over to Epcot....not be stuck and miserable. If you've never used a hopper ticket before and you enjoy your vacations at Disney with that touring style, I guess there really is no need to change up now, but we enjoy the flexibility and would be lost without it.