Attitudes aside, I agree that, for it's role as a simple stripped down browser, the K2 had some advantages over the K3. The K3's web kit browsers seems to try to be too powerful and fails. I've posted here in several places about how much better my gmail experience is on our K2 than on the K3.
As for what to do about it, write to
kindle-feedback@amazon.com and suggest the changes you'd like to see.
I'm still holding out hope for the browser in firmware version 3.0.4!