So what does the world need in a new dinghy then?

A gap exists between the 'proper' asymmetrics, where apparent wind sailing really starts to work and the other group where although they sport the rig they cannot really be regarded as 'true' asymmetrics.  (If you like typified by boats with minimum 400 pace  ... or by 200 speed type boats).  In this range, imo at least, asymmetrics are more than given a run for their money by several good symmetrical spinnaker boats (Scorpion/Merlin etc) or even by the odd 2-sail boat in the UK (well I would still say that ...!).   

Developing potential 'new' boats in any sector is always problematic in a likely declining market.  The best route for any producer at the moment could be to simply improve what they already have...  Either by developing/improving their current offerings or reducing the core production costs.  Ideally 'more for less' should be the objective – if possible.  The UK is a niche market and now faces a difficult future with material inflation (nearly all materials for boats are imported - the currency already devalued by upwards of 20ish%).   Before anyone starts on the ‘value-adding’ done here do note that the UK labour element is but a small part of the overall build spend.

I'd expect to see most makers hunkering down this year and beyond for a while, cutting costs, no new launches, and still making a few quid on parts for existing boats and a lower number of new UK boat sales where they can.  If they already have the channels in place they will be working hard on exporting what they have.   A better (less worse) prospect for exporters and really tough times ahead for importers who will need to be able to live with significantly reduced margins to sell here for who knows how long ... maybe forever.    

I would not expect to see too many new pure racing boat types for quite some time   .. except perhaps on this forum !