Just want to mention, Keith, that the correct pronunciation is "MEE a zawa" not "MY a zawa"--for what it's worth. I can see now where you are coming from. You are still at a point where you do not really focus the sound. This is not a criticism, just an observation. In that state of affairs, I can see why you prefer an easy-blowing flute, since it seems to respond much better at the moment. I was seduced by a couple of newer Japanese designs, like the Sankyo and the Altus, which blow big and easy. They Miyazawas I have played are also like that. I actually found an Altus 1007 for $700 (silver body, plated keywork), which I bought. At first I was very impressed with how easy it was to play, but since then I have drifted back to my German flutes for banging around, because I find that at higher volumes the Altus has already hit its ceiling, and that is when the Hammigs have more expression, as they have held something in reserve, so to speak. I agree with what SimonJazzSax says about instant gratification.
That being said, I think that modern Japanese flutes are ideal for doublers, especially because (at least for me) picking up a flute after playing sax for a while, I do find that my embouchure isn't perfect, and in that case the freer-blowing flutes are more forgiving. Nor am I, who traded flutes promiscuously for a number of years and still have more than I need, saying that you should not have the instrument with which you feel most comfortable. You may find yourself changing flutes a number of times as you evolve as a flute player.