There are, like, three things wrong with this sentence. First, you totally dismiss concerns with the system that actual people had and that the designers agreed with. Second, you assume that anyone who didn't see the problems with grappling or wizards must have felt crapped on. And, third, (and most egregious) you came to the conclusion that system mastery determined whether or not someone felt slighted by WotC's marketing. Really?
People felt crapped on because they were on the lookout for new and exciting reasons to be upset with WotC. Whether or not they had good reasons to be upset didn't matter at all to them.
Okay, so not everyone felt crapped on (which I never said), but many people did, and that's my point. I myself was happy with the things Wizards was doing with 3e, and it seemed it had several more years of life when out of the blue, a new edition! After them saying there was no new edition in the works! IMO, that was bad marketing! Plus the fiasco of the SRD and some of the DDI stuff (no virtual tabletop, etc.).