Unpopular opinion: AP items still feel weird

Other than the huge and obvious problem that is Rylai's AP Itemization still seems a bit odd in practice, I feel like the options for CDR and mana seem oddly placed

(Not counting Lich Bane and Nashor's, those are champion specific)

All of these choices except Morello's (debatably, what the heck is that grievous wounds passive.) should be situational (looking at you, Zhonya's, and possibly you, protobelt.)

So champions that build tear and therefore already have enough mana have to forgo damage items and build , which is fine, unless they're Cassiopeia or something.

Is it a deliberate choice for AP itemization to require either runes, sacrificing MPen, or odd build paths? Why are all the common CDR options situational? Why these items in particular (Well, I definitely know Morello's is THE CDR item, but why CDR and mana on the grievous wounds item? Why not make it build out of a % mpen option to be anti-tank?)

Also, another problem is Void staff vs DCap. Everyone knows the clear high MR Void high AP DCap but they both fill the same niche in that %Mpen is not like %Armpen, magic ability damage will always be fairly ineffective without DoT or %hp, so Void Staff is in a state where it contributes to damage even against squishies and DCap contributes damage even against tanks and you have to ask yourself what the math behind the two are, because in the end they both just add unconditional damage.

Finally, tear upgrade Seraph has such a weird synergy with other items, it encourages RoA but makes Morello a questionable pick due to the fact Morello just adds more mana on top of your huge mana pool, but at the same time is not like Manamune where it increases your mana spent by a noticeable amount. I honestly think Seraph's should be changed to a passive that just takes a flat amount of damage equal to a % (like, 0.5%) of your current mana and takes up to that amount of damage to your mana pool instead of health bar each hit.

EDIT: lmao downvote squad without any feedback