Step 1: Cut down on making cutesy cheesecake shows just for the sake of pandering to horny weebs. You're not gonna make money by catering to such a small niche. Put your resources elsewhere.
This is currently their only source of reliable revenue. That shit pays for the passion projects like Showa Genroku Rakugo or Aku no Hana, which are financial failures (Aku no Hana moreso than Showa Genroku).
Step 2: Don't make a series based on a manga unless you have enough material to adapt. You're spreading the current workforce thin by constantly making 12 episode seasons for a million manga titles every year instead of waiting until there's enough material in a title for 26 to 50 episodes and banging it all out at once.
This is up to the owners of the original property, not the the studios themselves. The studios don't waltz up to Oda and go "we want to make some more One Piece", it's Shueisha who goes to Toei and ask for more episodes whenever Shueisha feels like it.
Step 3: Set up a minimum wage / train staff. The reasons why there's not enough animators is because the idea of being a borderline-slave is totally unappealing. It'll be an investment at first, but set up a decent wage to lure potential employees in...and then properly train staff so they can work faster and more efficiently with less broadcast errors (which would otherwise take up man hours to fix for the Blu-Ray).
Broadcast errors are almost wholly due to time constraints which is itself a product of the relationship between studios, publishers, and broadcasters, and not because there isn't enough talent to go around (this is true but a separate issue).
BahiJD, a notable animator from Austria who broke into the industry, drew these amazing cuts for Ping Pong during its production:
But they didn't make it to broadcast, because they just didn't have enough time to inbetween all the frames, basically the lowest level work for animators.
@bahijd
I did over 20 cuts, but they didn't make it into the show because of tight TV schedule, very sad for me but I have to keep moving forward.