i think ad and sheen items need a rework + all bruiser items should be changed to scale off base ad
in specific 
(for triforce the ad value that the item grants directly)
morello has forseen a problematic issue with the introduction of bruiser items already years ago. he was always worried, that if items were introduced that could be core on bruisers, that assassins, and ranged adc in particular may be able to utilize these items better than the class of champions they were actually intended for.
as these last few month have painfully shown, this turned out to be true in many ways.
be it
with
with 
with
or every goddamn marksman, assassin and melee adc in this game with 
and 
the latest example with lucian will certainly not be the last.
my proposed idea to fix this issue would be to
-
drastically reduce base ad/lvl scaling on all marksmen, assassins and melee adc. possibly completely removing the scaling past its base value at lvl 1, and in return buff ad items across the board to compensate. the result would be very low base ad values on marksmen, assassins and melee adc, with higher bonus ad values from items this will not result in a net loss when it comes to these champions lategames, but rather a shift from base ad to bonus ad
-
change ability scalings on these champions to bonus ad across the board for everyone who doesnt already scale like this
-
change
and other items directly intended for bruisers to increase base ad instead of granting bonus ad as a stat. -
this of course means
will have to get a rework not to scale off base ad anymore, if we want to prevent a situation where bruisers and tanks would stack base ad increasing items and just 1 shot people with sheen procs.
another possibility might be to have sheen items scale with a mix of base ad, and level scaling damage, to lower the impact of extremely high base ad values, while not removing the scaling entirely.
example:
triforce grants 25% base attack damage, instead of 25 bonus attack damage.
sheen passive changed to 20 + 10/lvl + 25% base ad.
. but were not. since this build emerged, ive seen every single lucian rushing these 2 items.
running around with a freaking assassin item 
to 2 shot people with her q, has nothing to do with the lack of adc items to chose from.
and 
, whose dashes cost 50/100 mana at all ranks (while being less spammable), or