Okay, for starters, as I pointed out in my original post, the chords are supposed to be rolled throughout. That is the way Debussy played his own music.
I have discussed arpeggiation at length with Ken Caswell, who re-recorded the Debussy roll. When I told him that it is often stated that a block chord cannot be played on a Welte-Migon piano, his answer has always been a common expletive which cannot be printed here.You, sir, have never spoken to directly or written or emailed correspondence to any person who has recorded on one of these pianos. Therefore, your technical knowledge on this subject is conjecture at best! Further, when Earl Wild, who heard Rachmaninoff perform "live" over 100 times, says the composer rarely played a non-broken octave, then that trumps some studio recording, and then some.Further, I am personal friends with the composer Ramon Sender who is the only living student of George Copeland. Copeland was the only American to ever personally study under Claude Debussy, and his analog recordings show arpeggiation throughout. Therefore, I have the living testimony from one of his students that this is the way the music was played by his teacher, who was taught by the composer.And, for the record, Claude Debussy put no pedal markings in his piano music, nor did he suggest any fingerings.