Well, taking into consideration that an average WDW trip (all inclusive) can easily cost as much as a decent used car, I think the comparison is valid.
When FP's for an entire stay ALL disappear does it mean a completely ruined trip? No, of course not. But, you are in fact not getting what you paid for. Reasonable expectation for a wdw trip in 2014 includes the use of FP+. Disney markets very heavily to get this message across! To have a system that, for MONTHS is glitchy and is KNOWN cause persons to lose a certain % of enjoyment (use of FP+) of the product paid for (the package) and NOT fix it is neglectful. Yes, I think wdw has a "lemon" on its hands. The question is, when are they going to do something about it? Are the victims of glitches simply being seen as "collateral damage" for the greater good (the rest who don't experience glitches)?
Now back to the car analogy. If you paid, say $5-6,000 for a used vehicle from a reputable dealer, would you be ok with say, the a/c going in the first month? or the power windows? You can still drive the car, the stereo works, headlights, engine runs like a clock. So your car is not "ruined" but a large enough % of what you expected from the vehicle is now not available to you. I'd imagine most people would be pretty upset by this and on the phone to the dealer to get it resolved. The difference is, a/c can be fixed and your car is back to what you expected from it at the time of purchase. If CMs cannot restore FP+s, the poor person/family is stuck with standing in standby lines and then the vaca is over and no chance to "fix" it and do it over.
I've not personally experienced any glitch in MDE. But I can certainly empathize with those here who have. I'd be pretty steamed. No, I'd not take my frustrations out on the CMs on the phone, but I'd certainly let the company pitching this great new product (FP+) know that I wasn't happy with it!
Back in Oct of 2013 when I started planning our 9/14 trip I was SURE the kinks would be ironed out of this new system. Frankly, I am shocked that this type of thing is still happening. I "played by the rules" and got my ADRs and FP+ on time. They are mine. They are in my MDE right now. I expect them to be there for use during the entire length of my stay in Sept. I really don't think this is TOO much to ask, is it?