50:50 for me...
Removal of the optical drive - well, it's going to happen, and in this, I'm not too fussed. USB and Networks can fill the gap.
Removal of the ethernet port - just no. Wrong side of the pillar/Authentication issues/Security...and so on.
I wonder how long before we get bespoke Apple Thunderbolt-Ethernet adaptors along the lines of the proprietory video adaptors - I've got an entire drawer full of the various types now - the 30 pound extra tax on buying a MacBook as I always called it. I know you can get USB-Ethernet adaptors, but darling, it isn't Apple branded, and so, just won't do...