We've done park touring both ways many times. On the one hand-if by hopping you mean going directly park to park via bus, then hopping costs time. Much lower time cost if you usually take breaks.
IMO, the short answer is that your value is proportional to how late you stay in MK. Stay (very) late = worth doing. If not, then maybe not.
Under old FP, hopping wasn't generally worth the cost, IMO. New FP= new strategies. Armed with AP's we have now tried hopping several times, with FP+ in flux. Every time FP+changes, the game changes.
SOoooo, last spring we hopped Epcot to HS, with 3FP in HS. At RD, we made a beeline for TT. This was the tail end of paper FP. We nabbed our last paper FP, plus one standby run. We were just outside the pre-ride design room when our FP+ window opened for TSM. We made it to TSM just before our FP+ window ended- BUT- the long walk/jog kind of wiped us out, at least compared to our norm. TT to TSM is a LONG walk! Taking the boat is fine, but adds time we didn't have. SO what I thought would be new + of FP+, wasn't so great.
Hopping via car/foot is better than by bus/monorail, but still costs quite still costs quite a bit of time.
The best time/combo to take advantage of hopping is yours: busy week+ MK late night+ CR, or maybe hopping for meals. (always our two best hops) Still, if you only want to hop once, it is $$$. Under new FP, hopping means limited ability to use FP in your second park. We had AP's so hopping was included. Still not sure I'd pay w/reg tickets.