Magic pen vs armor pen and lethality

So is it just me or is there starting to become a great disparity in the game between Magic classes and AD classes as far as items go, especially for magic pen. We just recently lost abyssal scepter as an mr reducer so that leaves us with what 3 items to pick from now? Void staff, Liandry's and boots..... All the while AD is getting Lord Dominik's regards, Mortal Reminder, Youmuu's, Black cleaver, Edge of night, Duskblade, did i miss any? That is 6 to our 3. On top of this magic pen stats are always far lower and less effective than armor and lethality. As it stands if an enemy champion builds two MR items it becomes very hard to deal with them and they can still just walk up to you and delete you.

On top of this they also removed mana regen for all ap casters from the game so we lost lane sustain. All the while Ad casters are unaffected and some dont even have to worry at all about mana. So we end up having to recall at times just for mana. I feel riot is trying to force the game into an all out AD brawl and push all ap into just support roles.

And even more insult to injury there are more items that both give magic resist and AD damage. Edge of night, Maw, Mercurial, Dervish blade if you want attack speed and MR. What do we get to fend off ad and get ability power Zhonya's that has been nerfed recently mind you and piece of junk that no one will ever use moonflair.

Riot i would like to see some more AP items in game to help close this gap between the two roles. I am tired of becoming obsolete near the end game because i lack the items to do well. I am sick of landing all of my abilities on an enemy and them walking away nearly unscathed or to have them flash or use a gap close and blow me up in less than a second. Its getting old.....FAST