One opinion of the Ryali's Problem; and how to fix it. * /r/summonerschool

Pretty much a repost of a discussion I had started on reddit but I would Like to add some points that are not in the OP: "Ryali's first Problem comes with Riot's tiers of AP" Model. I.e:

1. 120 AP deathcap
2. the 3 great AP Items (Ryali's, luden's and Morello)
3. the mid tiers (Hextech Gunblade, GLP-800, Lich Bane, archangel's,Void Staff Nashors )
4. the defense items (zhonya, absasal, Rod of Ages)
5. the support items (pretty much anything 60 ap and under, bar guinsoo's with is one of 3 hybrid items) Because of this Model, AP Carries have to itemize to do damage and and ryali's happens to be the best of both world's in that regards. Survivability is huge in this meta, and ryali's offers it the fastest and most consistently."

Here's an Idea, why don't we buff all completed ap items from the defensive tier up in the game by 20 ap, except Ryali's and revert, the rylai's passive to 4.13 patch notes? Is there any reason this wouldnt work/ be balanced for AP champions in general? feel free to open the discussion on here or on the reddit thread.