Love all of the additions, and I like the Kitchen the way it is. Boddy wouldn't have much reason to go to the kitchen, and therefore wouldn't really care too much about its state. If he needed to speak to Mrs. White about dinner, he'd just have her come into the study.
Speaking of Mrs. White, the Kitchen reflects on the "prison cook" look you were aiming for so all the more reason to leave it the way it is.
Well actually, Mrs. White isn't really a crude prison cook. She used to work in a prison, but brought a certain sense of refinement with her. However, there's also a bit of pitbull side to her and that is what the cigar illustrates (as well as her appreciation for the finer things in life).
As for the Kitchen, I will be changing it for sure. Mr. Boddy would care about the condition of his Kitchen because he'd care most of all where the food, that is put in his precious stomach, would be prepared.
If your a millionaire, you wouldn't want to have a dusty, old Victorian kitchen during Edwardian times, unless Boddy simply let the Kitchen fall behind the times. Or he could be that eccentric, which I do picture him as, but in a different sense.
Lastly, it's just too boring a picture, even if it is just a Kitchen.