Believe it or not our floor was not quite level, and we tried to work around it, but our planned tolerances for the tiles were quite tight and so we bit the bullet and poured some self leveler to bring things up to speed.
In action (unfortunately the high spot was not at the door):
Nice and flat! We also made some good decisions regarding the new threshold size and location. We’re going to use the same marble as our vanity and tub surround.