Somewhere I have images showing it with side & top covers, so I assume these fowl weather additions would improve the aerodynamics. Not a lot an HPV designer can do, considering reasonable weight & monetary limitations.
The nose shape is good. The tail needs to be fuller and wheels blended better. Get some plans for a glider or sailplane model and Kamm the tail at 75% of the length. Oh yes, a floor pan would be handy.