I would love to see a lot more restrictions on resting... where you can do it, how often you can do it... even what times during the game day it can be done... It would make for a MUCH more engaging challenge in terms of resource management. Heck, I'd even like to have a fatigue system so that if you do too much between rests, or spend too much of your time walking around 1 pound short of fully encumbered, your combat effectiveness, movement speed, and ability to concentrate on spells falls off the edge of a dark cliff.
Unfortunately, I don't believe that any of that is going to make it into the game. I think that the current unfettered rest-as-you-please mechanics are going to be the place where this will all end up in the end. In short, I think that (d) was the correct answer there.