sam,
No problem.
I fly commercial air transport almost exclusively too... and have not noticed the "tiling" in the Japan area. I'll have to look closer now.
I think their hi rez Alaska terraain mesh package also includes landclass for there. Not sure.
I have all their mesh pacakges for the entire USA and Canada, all of Asia, and scattered selected parts of the rest of the world where I have an interest. It makes an amazing difference in the flying experience.
I did notice that they didn't include enough golf courses in Japan ;D.
I also have the FSGenesis American Roads, Rails, and Streams scenery installed, and for me it seems to be fantastic. Then I added FSGFenesis NURoaadPaver and that makes things even better (worldwide).
I got a 1 year subscription membership to FSGenesis...... and that makes it a bit more affordable to do this stuff

.
I too am a "scenery junkie" more than an aircraft junkie. I am always looking to improve the external visual. I think that is due to flying now in a simpit...... I have a "real virtual" aircraft all around me......... so add on planes do not excite me too much.
I generally don't like most of the VFR photographic stuff though. I
HATE the "flat" bit when you are descending closer to the ground. Megascenery stuff is fair in that regard... but still too "autogen deficient" for my tastes.
best,
.......................john