Great step forward for both of you and i had the same problem with people being shocked at how Rob looked .I saw him every day and although i was aware he looked different i thought he looked good by the time he started to go out again.To people who hadnt seen him for a long time it was a bit of a body blow and they found it difficult to hide their surprise at the weight loss and short hair,and his general air of frailty.As for the energy levels, i think that is just a time thing and after all he is still undergoing treatment so try not to expect too much.
Good luck with the next round of chemo.