I'm honestly having difficulty understanding your problem, or understanding what you want WotC to do about it. Did they force the fighter's character sheet to change mid-battle? Did they forcibly take away the Cannith Goggles?
You are completely free to control if and when errata take effect in your game. If they're too frequent, just set your own schedule on when things can change. And if something you weren't using gets errata'd... well you weren't using it, so I don't see why you're worried about it.
What kept you from ignoring the change to CaGI? Do you never write down/print out character sheets and rely on the CB to look up powers mid-session? If you really do this, then yes, you're necessarily committed to closely following errata. But if the fighter had the old CaGI on her sheet, I don't see why you couldn't have stuck with it.
We have no control over if or when or what gets changed in the online Character Builder. In Character Builder, there is no option for using an earlier version of a rule, and there is no option for using customized house-rules.
Also, like neuronphaser, my players only really access the Character Builder once every month or two when they level up their characters and print out a fresh character sheet. Those character sheets are the rules reference we use at the table. While everyone is generally familiar with everyone else's powers, we still look to the printed character sheets for the details and numbers and will notice even small changes then. But that also means that changes are always noticed until
in media res when the action is flying high. It's the sudden shock of not having the rules work the way you expected them to that causes much of the consternation.
It's not even really the changes that area problem, mostly. Our Fighter's player, for example, understands why they changed Come And Get It, and though she thinks the change might have nerfed the power just a little too much, she still likes it, kept it, and uses it. But the way they automatically implement the errata and updates is making it difficult for us as a group to assess and assimilate those changes before we decide to implement in our game.
It feels as if we have no choice as to whether or not want to use any given update, and it's been rubbing me the wrong way lately.
EDIT: Plane Sailing + Windjammer == My problem, precisely.