I know losing AP on items sucks, but it's probably best that Riot allocates it to Dcap.

Another post was detailing why that's an awful change, but I really think it's probably the best move Riot can make - turn Rabadon's into a stronger OR more accessible item (lower gold cost or up AP).

Why?

Because items get their own niche. They can be fairly strong and usable in their own right without being the general "oh everyone gets Morello's first and then this item because if they don't they're basically trolling."

And more importantly, this makes Rabadon's a must, which is vital when you have so many abuse cases of AP champs doing too much damage without super amazing AP items like Void or Cap. Especially Cap because nobody wants it first now unless they have utility scalings or can reach the backline with ease (LB, Ahri).

So less of that Rylai's Lich Bane Abyssal Nid nonsense that was going on about half a season ago. Kat's going to require a little more skill and less nukes that slow. Syndra will be downright weaker. Vlad will get weaker (sorry Vlad mains) so that they can stop and focus on what he does that's special as opposed to tiptoeing around debating whether or not to buff AP items because Vlad will break them.

And champions that don't need the AP/HP as much but hold onto that slow for dear life will appreciate the cost buffs to Rylai's/Liandry's. Brand, Malzahar, and Taliyah might see more play because they actually can DPS comparatively without being overwhelmed by a Morello/Rylai Syndra.

So yeah buff Rabadon's, because I'd rather APs be balanced around utilizing one big, simple damage item and having items that accentuate their strengths rather than everyone buffed around Zhonya's Stasis, or Rylai's slow. Or Protobelt's active.