Interesting reading those posts. Of many of the recent upsells, I can see reason to maybe do this. However, I doubt it is something we would do. We usually hop very, very little, of our 10 trips in the last 10 years, I think we've only had the hopper option for 3 of them, and even when we do we don't usually hop more than 3 times a trip. Last trip we had non-hoppers and didn't miss them. I just looked back at our August/September 2015 Itinerary when we had hoppers - while we hopped 5 days during the trip, each time we went back to the hotel for several hours between switching resorts. I was the only one that travelled park-to-park, and only once. So, for us, I just don't see spending the money on it.
The exception is we've often talked of doing 4 parks in one day. I might do it for something like that. For folks that love to hop between parks, I could see this making a ton of sense.
As pointed out - figure it could save you about 20-40 minutes per hop depending on where in the park you are. Factor in the timing and your location in the park versus the front - let's call it 30 minutes on average that it saves you per hop. Let's say you use it once a day on average. Save you 3.5 hours across the length of your trip - that might be worth $24 a piece.