Hmmm...mixed feelings for me too. Personally, I've always looked at MS Flight Sim as a semi-casual form of "edutainment"; the kind of "game" that can provide you with some basic aviation skills in the comfort of your own living room. An essential part of that has been the possibility to fly around in any part of the world; perhaps most around the areas close to home. A game like this will perhaps give me the opportunity at some point, but to what cost? And with which airplanes?
However, being a 3D artist, I can understand the dilemma. Given the screenshots, my guess is that the dev team has tried the utmost to give an as true-to-life experience of Hawaii as humanly possible. But - to do that for the entire world would be utterly expensive. Too expensive, in fact, and possibly with all kinds of hardware problems (lod-ing, texture memory, preloading of adjacent areas, synching in MP with low end/high end computers etc). Nonetheless, even if we say we are willing to accept less graphics for more flying, that is a "modified truth". Most of us do expect (and even though we may not at times admit it - want) a nice-looking game. So going for the lower end of graphical detail simply isn't an option, especially not after games with such outstanding graphics as IL2:CoD and Rise of Flight.
I won't complain when things are for free. But for this game to really make me want to invest, it simply has to be in the top end in areas like flight realism, physics and (future) choice of geolocation. Let's hope they will release geo expansions to a fair price. If the planes are proportionally expensive is less of a problem, I find. A single really good Cessna 172 will keep my interest far longer than a dozen half-sloppy whatever-planes.
Just my opinion, and I don't expect all to agree. Just airing (pun intended ) some thoughts!