I read up a bit on what they have in store - to me, if felt more like "riot anniversary event", rather than LoL anniversary. They still haven't implemented a 2FA, for example.
I'm looking forward to their ARPG and the mobile versions of LoL and teamfight tactics, and I'm curious to see what the animation will be about, but this all puts League in the background. For me, anyway.
I used to play it for hours upon hours, every day, I played it for 6 years and they kept ignoring and ruining my favorite champion in favour of the cool anime-looking ones. I hope that they change Wukong up. I like it that they've focused a bit more on Karma during the last 2 major cinematics - she's my favorite support champ, and she deserves more recognition.
Sorry if I'm sounding like a salty dog, I am genuinely interested in their new content, but this just didn't feel like a LoL anniversary to me.