I'm glad you mention this - on my last few flights I've been disappointed with the selections and hardly anything I've wanted to watch. I never used to have this problem - there were always a handful of films and TV programmes I'd be happy to watch, whether new releases or older 'classics'. Certainly more than enough to fill a flight.
Seems to have got worse in the past six months in particular. I mention this as I recall a couple of good flights for IFE in the first half of the year where there was more than I could fit in.
Just another enhancement to add to the list, I guess?