I guess everyone would like something different and it would be difficult to choose between everything suggested. Personally I would like an Interested flag.
Bearcat
This is not about enhancements to the software, IE new features, Airnav have maintained that they would look at the enhancements like an interested flag as part of the 'next great thing'.
However, the 'next great thing' always seems to take 2-3 years to develop and V4.03 has now been out for two and a half years full of bugs.
In the interest of good customer service to its current user base and to continue sales of its current product lines, any sensible company would issue patches to their current product lines to make V4.03 stable and bug free.
Even if it meant it had to temporarily put on hold development of the 'next great thing' and any desirable or otherwise enhancements that may or may not contain. I bought Radarbox and am very happy with the features of V4.03 as they were advertised to me. However, I just want V4.03 to operate as advertised and it currently does not.
If I choose not to update for whatever reason with whatever enhancement comes with the 'next great thing' (because new features do not suit my needs or have different costs perhaps), I as a valued existing customer will then be left to live with the bugs in V4.03 forever more. A patch now to solve those bugs would keep us all happy campers in the interim and then we can all decide in future whether 'the next great thing' suits our needs and make logical decisions on whether to download/purchase it.