Guys, you asked for AP + CDR options. You're getting them. But you have to trade mana regen for it.
If mages get more CDR, they can't have the same mana regen.
More CDR + same MP/5 = cancer wave clear and cancer poke. Can defend all day. Extra-oppressive when combined with a hard-to-duel split-pusher.
More CDR + less MP/5 = weaker mages, but they aren't doing that. What they are doing is...
More CDR + less MP/5 + bigger mana pool.
Allows for more spell rotations in a single fight/skirmish/stand-off, and hence fun, powerful mages. Sure, you can't play PvE for 45 minutes straight with Ziggs/Orianna/Xerath/Syndra/ Zyra/Viktor like back in Season 3-4, but I don't think anybody will miss that.
does but you know how Riot is.
as first item and do just fine