We've had long running difficulties with some champs who perform dramatically better for organized teams (pro teams, premade 5s, Clash soon etc) than they do for matchmade solo queue teams. Azir, Kalista and Ryze are the strongest example of that, where their performance for the average player trying them will often look pretty weak if they're in a balanced state for organized teams. One of our goals with champion balance is to ensure they're good choices in a wide range of contexts, so that's not ideal. At the same time though they're still situationally very strong even in solo queue sometimes.
We've also put a lot of time into trying to close that gap on those three over the years, with mixed success, given some parts of those champions core identities are tied to the very elements that give them that variance in power by context. For a while, quite possibly a long while at that, we're going to be prioritizing most other champion work over closing that gap as a result. That means Azir, Kalista and Ryze will be balanced for their strong cases (organized play primarily), even if that leaves them quite weak in other contexts (exception: a bit of Ryze work that's already underway and might or might not ship). It's not that we think that's the perfect solution, but that we think the time's better spent on other champions who haven't got that same degree of attention over the years and would benefit a lot from it.
If you're someone who likes those champs, but feels you shouldn't play them in solo queue, our apologies. I expect that feels pretty rough and that even if these champs are strong in the right circumstances that doesn't help if those circumstances aren't ones you personally experience. Completely agree there are downsides to this approach, we do think it's the best available trade off for LoL players as a whole though.
https://boards.na.leagueoflegends.com/en/c/developer-corner/EEHXQ3kv-quick-gameplay-thoughts-march-23
