/u/RiotJag, If I could follow on, is there a reason that Mage itemization would wait until the next pre-season? The dev balance team has been killing it with the larger item iteration sets, lately. IMO Its been much better for the game to get these larger patches to address gameplay after the S11 preseason, instead of the usual wait till the next preseason.
There is also the meme that this entire season is still in pre-season, so I don't think it would be any harm to see changes sooner than later, once they are ready. I think everyone would love to just have an idea of what is going on behind the scenes to polish the AP item system off.
The scope of such changes is very large, and so there's just a lot of work required behind it, and that takes time.
We're not waiting for any reason other than we have a lot of stuff in the pipeline right now. :)