now that assassins have their own itemization, revert cleavers stats in favor of bruisers.
in preseason 6, its base stats were changed from 400 health and 40 ad to 300 health and 55 ad. (later nerfed to 50 ad with a cost reduction attached)
keeping a higher ad value on the item made sense at the time, since assassins didnt have their own dedicated itemization. they were still somewhat reliant on borrowing items from adc and fighters to do their job.
since the assassin update, they have their own dedicated armor pen itemization to work with
and as always 
next to other cdr options like

was an item that was designed as a core item for spell based fighters, and secondary item for assassins with bleed effects or multi hit abilities.
now that they have their own itemization, the needs of fighters should be taken into consideration first, when it comes to cleaver. even (or especially) when it makes the item more stat inefficient on squishy ranged champions and more stat efficient on fighters.
the recipe should be reverted to
+
and its stats reverted to 400 health and 40 ad.
with the massive amount of health that was removed from defensive items in season 6, it would make sense to give cleaver its old health back. fighters value the 100 health more than the 10 extra ad.