Summary post on PS4 Optical Drive issues, so please excuse the quote-fest below (I did trim a few).
Went through the latter 20 pages of this thread seeking disc drive issues. There are several reports of needing to use the Eject button multiple times to eject a disc (but consistently reading discs), and several reports on the noise(s) or volume specifically of the disc drive (but consistently reading discs). As for the issue of the disc drive having problems accepting/auto-ejecting/reading discs (not reading discs or not consistent), I count 7 reports here so far, mine included.
Several folks here posted later updates 'might be fixed', 'I'm trying this', but they all sound like the same issue I had and am unwilling to accept. Not trying to misrepresent anyone here, but I'm reading these all as the same issue, and that seems significant (still may not be as frequent as the BLOD issues being reported).