sounds like it'd turn it into a tank item which is not the intended use eitherSolo Queue man. You can't trust anyone but yourself.
Besides, I think those items are fine, if a bit overtuned. I do think that adcs should build these items against assassins, but at the cost of lower damage input and lack of armour pen.
I think Maw shouldn't have the armour pen. It should have something else because it seems to double up effectively as an effective defensive and offensive item with an insane passive. Lowering the damage and changing the armour pen to something else would solve the problem.
maw i supposed to be an assassin/bruiser item to counter magic burst. it needs arpen so it's used by assassins, not adcs, and it's got a shit ton of ad so tanks don't use it either. problem is that it's too cost efficient and the passive is too damn strong right now compared to the ap alternative in zhonyas
at least with zhonyas you have to manually activate it and there's some prediction game involved to it. maw and sterak are just essentially tanking through stats and that's terrible for adcs
if an adc wants to survive an assassin they should have to actively do it like with qss
but it's definitely a problem with non ie adcs (graves, quinn, kaly) abusing it so they need to be nerfed too
so yeah, for maw i'd say probably say make it 50 ad and make the passive cd 100s at the least. for sterak i think cost is a move in the right direction
a lot of this would be less of an issue if zhonyas wasn't super stupid right now