I am sure the downplaying and increased price of no-expiration option is part of the plan as well. If I buy a 5 day ticket from Disney, I would be able to make 5 days worth of FP+ reservations 60 days out AND all 5 days would need to be within the same 14 day period. So If I was playing around and made FP+ reservations for May 3rd, I would need to cancel them in order to make my real FP+ reservations for June 25th 60 days out. I'm assuming the computer would know I don't have tickets enough for FP+'s on May 3rd and June 25th. That fact alone should take care of the majority of people. All you have left are Annual Pass Holders, who can make FP+ reservations already in advance if they've stayed onsite once, people with a stockpile of tickets or buy them way in the future, and people with no-expiration option.
If it becomes a big problem, Disney could give people one "mulligan" than charge them with using a days worth of FP+'s. So, you'd have a 5 day ticket and you could use FP+ on 4 of them because you made and didn't cancel FP+ reservations too many times.