I remember when the first rMBPs came out and people massively derided it for essentially dropping the CD drive by only offering it with the low-res models that still had the same base resolution as the first MBP from 6 years earlier (not to mention the complaining about dropping the FireWire port). Before that I remember how some people freaked out over the miniDisplayPort in the original unibody MBP and would much rather have kept the full size DVI port from the original Powerbook design MBP. Hell, people even freak out over new models like people did with the introduction of the original Macbook Air and the new Macbook.
Point is: Whenever Apple introduces a new product with sweeping changes people will always complain and say that Apple has gone too far regardless if it's an update to an existing product or a brand new one. This time is really no different and on the grand scheme of things this is very similar to a lot of the previous changes people have complained about.
Yes, people complained when a number of bugs were causing worse battery life, but those bugs have been fixed and people are now seeing better battery life than at launch. Talking about issues after they're fixed without mentioning that they've been fixed is misleading.
If you want to go down this rabbit hole I'm going to have to point out that if Apple went with every request/complaint their machines would still have floppy drives.
All in all this is a minor inconvenience for most of the people affected and hardly the doomsday scenario drama queens like a certain card loving macrumors poster is painting this as.
Not to mention the freak out by some in the Mac community when Apple made the move to the x86 processor and in doing so basically moved to PC hardware. Any time there is change, there is going to be a small and vocal segment resistant to it.