I like what you've done to her already and I'd have absolutely no objections to you altering her further. Personally, I'm not a big fan of a double deflector, but I loathe the dish on a stick so much more. I'm not sure, but I don't think the model would break if you removed the deflector hull entirely and replaced it with something else.
As for the TMP Chandley's hollow wings, the various drawings FASA came up with are rather ambiguous. Whilst some look hollow, some don't, and the metal miniature they came up with was definitely solid. I always figured the big shoulders were intended to house the large marine complements they were commissioned to carry, along with all their equipment and a host of training, medical and other support facilities.