Yes, it would be great if they included a lot more B&W movies and titles from the 30's and 40's in the series. And I have noticed in recent months that some titles are repeating. I agree, the availability of digital prints probably has a great deal to do with what titles are scheduled.
Nevertheless, I'm glad the series is still running and for the most part has been successful in our theater locally.
It's about Icons--Warner, being the timid paranoid neurotics that they are, literally think that the only "old movies" on their MGM catalog paying people care about anymore are the Big Three that Ted Turner used to push: Gone With the Wind, Singin' and Oz, while Casablanca and Robin Hood, Warner can at least sell as their own Warner movie.
Although we haven't gotten as many of those great old Warner restoration disks as we used to back in the day, watch what happens when Warner DOES put out a classic-movie Blu-ray boxset--The Great Musicals box includes Singin' in the Rain, even if we'd already bought it three times. The Golden Year 1939 box includes GWTW. Take a guess which movie they'd include with a "Great Family Movies" box. There, they've made it "safe" for you, by including a Ringer.
It's spread to other studios, now that every studio wants to Out-Icon each other: If we see a recognizable "old movie" from Paramount, it's likely to be Grease or John Hughes. If we see Fox, it's likely to be Planet of the Apes, Die Hard or Aliens. Universal's gone all-out Studio-Icon happy, but they're not sure whether that icon is Hitchcock, the Monsters, or anything that was already a theme-park attraction like Jaws or Back to the Future.
It's not necessarily that the public thinks the studio doesn't have any other old catalog movies, it's that the STUDIO doesn't think they have any other old catalog movies we remember...They're too busy making it All About Themselves and trying to remind us why they're not Warner or Disney. And if they keep it up, we will have a public that doesn't know any other old catalog movies.
(And I don't think it was necessarily the fact that Psycho and All About Eve were in B/W that brought such low audiences--
Eve has a bad guilt-by-association reputation as the "gayest" Bette Davis movie, while Psycho most people in our culture have already memorized by now...We've even got a cable series running that depends on knowing the twist ending!)