That goal really failed then. Support AP itemization is still quite suppressed, and if anything rises much above the rest, mages will jump back on them.
My other issue at the time was the general reduction in AP on items in compensation for CDR. I personally always reached 40% cdr before using runes and a Morello or Athene's, so the whole change was just a complete reduction in AP. This also assisted in the rise of Rylai's, because with the initial burst lowered and the loss of a high-AP item (
), mages needed ways to keep their enemies around for another attack
The whole MYMU was just a giant nerf with the exception of those mages who were updated in it, and even they received nerfs later.
I'm fully aware that there were many people involved in the changes as a whole, but there was at least the single Rioter who was talking about it with the playerbase.
The mana change did work out decently, though I'm not convinced that it actually solved any problem. Mage itemization was also cut down, and AP was lost pretty much everywhere.
I simply remain unconvinced that the change from high AP items to CDR everywhere was a good one. Mages should at least have the option to focus on single rotation burst if they want to, but high AP items are vanishing left and right; first Zhonya's and now Rylai's. I'm in full agreement that those items needed nerfs, but they just narrowed mage builds to a single path; full CDR and slow spam.
Riot's been doing this quite a bit recently though. They really have been hypocritical/straight up lying. They say they want build diversity and won't enforce the META, yet here we are with weakened bot turrets, armor-pen items nerfed, mana regen crippled, etc. I personally don't mind many of the changes, but I do miss being able to reach significantly high levels of AP or being able to stay out of base for an extended period of time without blue buff.