The munchkins will always exist amongst players of just about any game (barring old-school board games like Monopoly or Yahtzee). Their antics should not affect the design of a game because doing so just means that the more 'normal' players really need to dip into munchkinism or fall farther and farther behind.
Let's talk a bit about the design of the game. In previous incarnations, the design was to make mystic adepts split their Magic rating, giving them some very hard, ostensibly unfair choices to make. As stated by numerous developers and insiders, the original design of the current edition was to have the mystic adepts pay 5 karma per point. Ultimately, this isn't too much different from the previous editions, but it makes the choices a little easier. Going by previous editions, most mystic adepts just took the number of power points required to get them Improved Reflexes level 3. That meant they had 2 Magic for spellcasting and conjuring, and 4 Magic for power points. In this edition, you can do the same thing for 20 karma at character creation, and still get your full 6 points of Magic. I'd say that it's a fair compromise.
The design changed a little bit, and in the favor of the mystic adept.
On the topic of the "anti-mystic" comment: I think that's unfair and an incorrect appellation for those of us that have a differing opinion. Quite frankly, I find it a bit offensive. To suggest that because people disagree with you, that they're against a whole segment of the game is just rude. What I've pointed out to you is that the changes to the mystic adept have actually been positive for the archetype. You're saying it's not positive enough. You've been saying it for months, despite what the developers have stated was the original intention, despite the changes made in the errata, and ignoring the evidence that I have brought to you that the changes made were good for mystic adepts.