I think that when it comes to hopping, it has a lot to do with your vacation style. If you're into making the most of every minute, getting in as many rides as possible, closely following a touring plan, then hopping around can definitely seem like wasted time. It's likely going to really frustrate you if there are transportation delays because they mess up your schedule, and the more often you have to move from one place to another, the greater the odds you'll eventually run into a delay. If you're trying to convince yourself to take a break, but the whole time you're on the break you're thinking about what fun you could be having in the park, then it's not worth it, you know?
If you're more laid back in your Disney days, only bothering to worry about time if you have an ADR or a fastpass, and perhaps not even bothering to work with many of those (this approach obviously works best in the lowest crowds times of year), then hopping may be part of the fun for you. Maybe you want to try to use as many types of WDW transportation as possible, or check out a bunch of other resorts during your stay, then bopping from one park to your resort to another park one day, and from one park to another resort for lunch and to another park another day may be perfect for you.
It also depends on how you will travel around the world and how you feel about the travel itself. My husband views monorail rides as an attraction and I feel the same about any boat ride. We're all excited to at least try the gondolas when they are ready. So the time we spend traveling on these isn't a big deal to us.
But if you don't particularly like the transportation, then hopping is going to have you spending more time than necessary doing something you don't really like.