I understand your frustration but it looks like it comes from a lack of information or wrong assumptions. Let me to explain:
1. The E is not "a refined version" of the H. They are diffrent airframes including fuselages. In fact it was a lot of effort to create the E product. Just the flares took 2 months fulltime of a top-notch developer.

2. We do not "charge customers fully a second time". The original release of the H was $39.99. Now the E is available for $24.99. Also we do not "charge" we offer a product.

3. Will the H get updated to the latest set of features that the E already has? Yes, eventually.