Sayrra, that's horrible :(. I really hope you guys get some better news soon.
Saffynool - I'm no expert on this front, but personally, I really struggled with exercise in the first few weeks - leaden legs etc, but found it way easier after that.
I'm like you, and I just try and keep my 10,000 steps up. I think that's important for me. When I don't have that carby energy boost, sometimes I feel my energy levels (/metabolism?) dropping and I get a bit lethargic. Walking makes me feel way more energised and lively.
This has nothing to do with LC, but personally, I don't like exercise and I find it too much to make myself give up carbs and exercise in the same time period. Again, this is personal, but I have found in the past that if I set myself a daily workout challenge while dieting, I fail on the workout and then think 'sod it, may as well have some chocolate'. So what I do, is stick to walking and do any exercise above that when I feel like I would enjoy it. Or, I set myself shorter workout challenges. Over this BC, I set three weeks where I would do HIIT on 5 days. It's tough, but it's working, because I don't see months of it looming ahead. Anyway, very personal ramble there and probably not what you wanted to know.
The gist is that I agree with you, and I don't think exercise is that important (with the exception of walking which I think gets everything moving).
It's insane how taste buds change. I used to love Reece's peanut butter cups, but now I find a teaspoon of peanut butter just as enjoyable as they ever were.