No more SOL shit, at all. It's cancer, and boring at that.
School shit is banned unless the show takes place almost entirely outside the school and doesn't revolve around "normal" school experiences.
Any and all "Average Jap MC is reincarnated to fantasy world" works are hereby banned. This includes battle harems of all flavors as a prerequisite.
No beta, self insert, faggot, "average totally normal" MCs allowed UNLESS they have a reason to be such lame sad sacks, such as Shinji from NGE.
No more "cute girls in scenario that cute girls don't belong" (i.e. Haifuri, GuP, Sora no Woto, Upotte, etc.) unless it's actual warfare, the girls are actually trained soldiers, and people, including cute girls, die horrible war deaths. If you don't want this then stop cramming cute girls into war scenarios you fucks.
Kyoani and Shaft is dissolved as companies and their employees and assets are split among decent anime studios.
More well funded original works, rather than shitty LN/manga adaptations or shit made to appeal to the lowest common denominator just to guarantee success. Give creators more leeway to make different, exciting, or pleasing shows without worrying about printing money or selling merch.
Quality over quantity. One high budget, long term production show beats out a low budget, shitty adaptation or SOL/school/harem/ecchi shit show any day. Also, if you start a story finish it and finish it with finality. No more of this one season hoping for a second season open ended shit. Just make your story as is.
No all female casts. All male casts have the potential to be decent, but all female casts are always objectively horrible and more worried about pandering than making a decent show.