Both my previous and current R/C builds have been freelance, though loosely based on real prototypes. I find freelance building is particularly suited to civil ships as there were/are countless different designs and classes, many now poorly documented, and they often changed appearance + owners over the years, making individual ships unique (some types, such as steam yachts, were usually one-off custom builds in the first place); it'd be hard for anyone but a dedicated expert on a particular type and era of vessel to spot a freelance model. Building a model of a real ship with a real history is nice, but often very difficult due to lack of reference material; with the steam yacht I'm currently building, I only have a simplified plan and a single low-res photo of the prototype, so I am "filling in the gaps" with photos and drawings of other similar ships.
With warships it's a bit different, as most ships (at least of cruiser size and smaller) are one of a class rather than unique, and (for ships built in the last 100 years or so) references and historical information are readily available.
But that's just my preference - above all else, it's what you enjoy building that counts! Your Soviet sub-chaser looks amazing - I'm not too familiar with post-war ships, of any navy so certainly wouldn't have known it was freelance if you hadn't said; it looks very similar in style to other Soviet small warships I've seen, such as the Tarantul and Pauk-class corvettes.
IMHO a seperate section for freelance builds isn't a good idea, especially since, as other members have said, the line between freelance and kitbashed/planbashed/semi-scale is a very loosely defined one!
"What-if" or hypothetical designs are another aspect of this area. A while ago I saw a converted "Kriegsmarine 1946" 1/72 Schnellboot with hydrofoils and an 88mm deck gun - this would make an interesting R/C conversion for the new Italeri 1/35 kit!
