Of the currently airing BLs, here are the nine I'm watching (with average MDL rating in parentheses), ranked more or less from my most to least favourite:
“DMD Friendship: Third Chapter” (7.9): lovin’ it
“Countdown to Yes” (7.9): lovin’ in
“Cat for Cash” (new): lovin’ it (me = dog/cat lover!)
“The Boyfriend S2” (7.7): generally good (in line with S1)
“FY2: Beside The Sky” (8.1): after first three annoying episodes, much better now
“Cosmetic Playlover S2” (7.5): good so far, but as with S1, more for characters/actors than story
“Peach Lover” (new): steamy mess (so far in a good way, but too soon to judge)
“Love Alert” (7.2): steamy trainwreck with weak acting and even worse writing, but I’m watching
“I’m Kishi Naito, Your Private Tutor” (7.5): stupid OTT manga-style comedy but with familiar BL actors
It surprises me that I don't see more divergence in the average MDL ratings.