Hi quantum,
Thanks for listening and commenting!
This is definitely a difficult piece to play in several respects, but I enjoyed the challenge.
Poeme No. 2 is a wonderful piece indeed. Why it's so eclipsed by Poeme No. 1 in that opus completely escapes me. Like you, I did opt for the quiet ending as I believe it better comports with the afterglow of ecstasy being expressed by Scriabin.
Incidentally, I also see Scriabin's writing as sometimes transcending rubato. For example, to give the listener the effect of "con calore", it won't happen well at tempo. So I relax the tempo there and at other times to allow for the savoring of the intense passion being expressed in this piece. While tempo and meter ultimately contain traditional rubato, in Scriabin I take tempo and meter as guidelines as opposed to being rules, to more liberally allow for the ebb and flow of the music. I believe it's the only way to play Scriabin effectively. I think you also have reached a similar conclusion.
I enjoyed listening to your rendition too. I think we might be the only ones to have posted the piece in this forum. Your detailed voicing of chords, voice leading and highlighting strategic harmonies are beautifully done--very thoughtful, refined and artistic playing. Congrats!
To answer your question: After much experimentation, I place the the two mics 8 feet away from the piano (as measured from the front leg of the piano, not the curve, since there are notes in the high treble there by that leg). I separate the mics by exactly 12 inches, and usually incline the mics about 15 degrees upward toward the top of the open lid. When I started the recording session, I had the lid fully up, as always. Well, half way through the first page, I thought the Baldwin was going to knock down the walls of the house! So I put the lid on the singer stick, which seemed to work well in this instance. Also, I'm fully satisfied with the Korg recorder. That was a great investment. I would recommend that unit to anyone.
Variable weather... groan.

I'm in eastern-central Maine, a brutal climate for pianos. Temperatures here last week were in the low 50s F with rain, but with some dry days in the 70s F. Tomorrow will be hitting 90 F! The piano enjoys central A/C, but even at that, the notorious temperature and humidity swings in northern New England will still raise havoc with any piano. The Baldwin was tuned on May 9th, but when I recorded the Scriabin on June 6th, the tuning had already slipped given the crazy weather. So I used the tuning lever to take the curse off a few notes before doing the recording. Some of this will be self correcting as the coming hot and humid conditions will cause a gain in the downbearing of the strings making the tones more sharp.