Yuri on Ice (some user might love this)
You're right, I would love a Yuri on Ice entry. YURI ON ICE FOR LIFE.
But erm yes, I would agree on maybe waiting a little longer (although hasn't stopped even admins before lol so what do I know), but personally my picks for entry-worthy shows go to Drifters, Yuri on Ice and Keijo. I come from a very different section of the anime fandom and I've seen Keijo get a lot of attention in a very Monster Girls-type of way. Haven't really seen much Flip Flappers though, that feels like a show that's very popular among a certain bubble of people but is pretty unknown outside of that. Drifters, Yuri on Ice and Keijo are the ones to watch though.
Also because I can't help myself
Already it sparked a controversy and mass triggering.
Lol at this shit, you have no idea what you're talking about. There REALLY are not many people morally outraged at Keijo, like at all. For a lot of so called SJWs it actually kind of hits that sweet spot of "fanservice too stupid to take seriously", like Monster Girls and Prison School. I can assure you it wouldn't be as popular as it is in certain circles if this wasn't the case, believe me. Not everything is an excuse to get back at the SJW boogeyman you've created, you know, I'd appreciate it if you didn't try to spin basically everything as a feminist controversy.