I feel I am letting the side down in my carbon deck proto with battery enclosure, I've had some private jobs running and been waiting over a month for some nuts/bolts to embed in the layup. Seeking alternative sources now, and then the deck should be rolling. Printing some gears and waiting on a few parts in shipping still and then should be under power and cruising. Advantages of the inclusive deck is that it is a neat, all in one package, but it runs the problems of battery size/replacement/type. While it doesn't have to be completely rigid, the battery compartment built in accomodates a certain size battery, so a user either has lipo or lifepo4, or runs a larger deck than needed and has the option of both.
The external mounted components have the advantage of using all deck types however, so compromises are made both ways. Would be too expensive to make several moulds for a fully enclosed carbon deck, to give the options, assuming you were looking at under 200,000 units each... Needless to say however, at this point in time I feel a fully inclusive version, be it carbon or timber like rs4race's, is the best option for the compact, simple and versatile unit it offers. Plus, if you are going for a speed/all rounder in terms of boards, you generally go towards the stiffer layups.