Well thank you for the reply, even though I guess our opinions differ somewhat.
I can see the logic in not needing firewire for new consumers who have nothing invested in firewire peripherals. Although those that have, and many will, from older (or newer in some cases) Camcorders and Hard drives, will berate the loss of, arguably for some tasks, a far superior interface than USB 2.0. And I think that loosing target disk mode is a mistake, although not often used it can be a valuable feature to have, even for the non tech savvy.
Now my opinion will definitely be biased, especially seeing as I recently purchased a new audio interface that is firewire (USB audio interfaces just don't cut the mustard), and besides the lack of firewire I can see that the updates have some very nice features.
Of note, and I know that this is purely anecdotal evidence, I have a friend who teaches at one of England's most popular music colleges (BIMM), and in discussion with him he's told me that he can't recommend the new macbooks to his students and the MBP is out of reach of most college go-ers, and this is from some one who teaches the students Pro-tools and Logic Pro.
So I guess at least for any audio use, pro, hobby or educational the choice is either the plastic macbook, or a refurbed macbook pro as I don't see the point in paying more for something that has less expandability than the previous model.
Thanks again for responding. And apologies for the original rant