1. It is vey easy to construct a cockpit tent and the "exaggerated" height of the cabin house (All things are relative) facilitated this process to make a snug waterproof environment.
2. It is absolutely correct that the lack of coamings in the cockpit allows for a "wet bum" experience, but having sailed on BCCs, Ables, Cape Doreys, Wet Snails and a host of other blue water boats,all of which do have coamings, I don't think this makes much difference - if you are pounding into a sea, you are going to get a wet bum. Enjoy! At my time of life it might be the only sensuous feeling I get!
3. Like any full keel vessel, the FC won't back up the way you want it to. Some, and the FC and BCC are among the best, will react to prop walk, so you have to know your boat and what RPM is needed to start to move the stern. Some boats, mine included, won't react until I max out the RPM when I shift into reverse. When I first had my boat I spent a few hours reversing the boat to moor up against a tethered barge. It might be more interesting if you try to do this up against a US warship, using that as your dock!
4. Adapt the bowsprit and make it retractable. This is fairly easy to do once you know your boat - just use a halyard in place of your forestay, pull the pin on the foestay and pull it back into the deck. (Some BCC owners do this so that the can save money in a marina, but heck! they are cheap!, there is a lot of difference between a 28' and a 37' boat!)
5 and 6; I would suggest that you look for responses from FC owners, I believe that many vessels have Force 10 heaters, and regarding stowage, for dinghys or anything else, it is a 24' boat. The dinghy is best stored collapsed on the deck, Locker space - it doesn't exist.
Possibilities: There are a few FCs without engines, which therefore have much more storage capacity which needs to be used to give the vessel balance. If you are a good sailor and can sail into you slip, this isn't a problem. To create power, put a notch in the aft rail and use a sculling oar. If you are not happy with this, consider an outboard. (Neither of these solutions give you GOOD reversing power.)
There are FC's and Norseas; I am not even going to go near that debate; there are many hundreds of postings wihin the forum discussing this. Ultimately the Sam L Morse built FCC in good codition will look after your body and soul!