I'm a trumpet player and also have an EWI Wind instrument. My philosophy towards the sounds of Electronic Wind instruments is that they should provide sounds which are not availalble in "normal" instruments.
I hate when the big Companies market their Wind instruments as a replacement for real instruments: Saxes, trumpets, flutes... no! Market it as a device for playing expressive Electronic sounds in a way that you cannot do with a keyboard.
And then if you want to play the sounds of a real World instrument - buy a sample library from sampling Experts - but still don't expect it to be perfect. If that's what you are after you need to pick up the real instrument (Baryton, alto flute, Valve-trombone...)... at the present technological state of sample modelling of wind instruments.