Full disclosure: I have not yet used FP+ in the parks (but I have gone through the booking process), and again, I don't think the old system was "broke", and I'd rather be dealing with that one ... business as usual.
But I have to say, I don't GET your point of view on any level. If you "don't want to plan rides", then don't. FP is not mandatory.
If you don't want to plan rides, then I'm assuming you didn't pull old school FPs, because that required planning on some level. Sure, not 60 days ahead of time, but advance planning, nonetheless. It wasn't 100% spontaneous.
If you "don't want to be penalized for not doing so", well, ok, but you do know it's just 3 rides, right? All the other family next to you will have on you is 3 rides, at the most. In the case of Epcot, for instance, we will only be keeping one of our FPs, so all we'd have on you is Soarin (which we could easily do at rope drop like we usually do ... without any sort of FP).
I 100% don't get it. If having the option to book FP in advance means that someone doesn't want to go to WDW, then I see what the PP was getting at. How bad did you really want to go if the thing that tips the scales is that you CAN (but don't have to) choose 3 fastpasses in advance?
Respectfully, I don't see why the "I-don't-want-to-plan-that-far-in-advance" folks don't just see that there's really no DOWNSIDE to going ahead and booking what you can. Use them or don't. Maybe you get to the park and don't feel like doing Peter Pan at 10:45. No one is going to to die. Just don't do it.
I get being unhappy about the new system. I have been too. I just don't get the vehemence.