Like many I just picked up the reissued version of " The Nightfly". Someone mentioned it was mastered from digital source and not the original analog masters...bummer. It is a very nice pressing and sounds excellent, for me this was always little bright but that might be more of by-product of the early 1980's influences on recording production.
I do have an original copy of " Aja" and it is not bright as at. I have owned many versions of Steely Dan & Fagen solo on DVD Audio and SACD, and vinyl back in the day, and they have never sounded bright IMHO. If you have the chance to hear the boxed set "Citizen Dan" it is quite good.
Sometime back I did a review of that on the music thread.
https://forum.audiogon.com/discussions/citizen-dan-boxed-set?highlight=Citizen%2BDan%2Bboxed%2Bset