How I read this is that we get an item this patch which is not the ad-caster item, and the ad-caster item he spoke of is that stupid Maw bull****?
I say it again, Renekton was not designed as a bruiser, he was only forced into the bruiser role due to missing itemisation.
The problem is, there are no good items (with brutalizer being the only one) that give you cdr and damage, Renekton is forced to gain as much cd-reduc he can, but he can't get cdr and damage and defense at the same time, because there are no proper items for it.
The general lack of ad-caster items is not items which give you damage and health, that are bruiser items and we have way too many of them already, the lack of items are items that give you damage and cdr. That would be an ad-caster item, and nothing else.
If it doesn't include even 5% cdr reduction, then it is no ad-caster item, it is a bruiser item.
The thing is that bruisers aren't dependant of cdr. Go Gangplank, build your bruiser items, you don't need a single % cdr in it, and you have dozens of items to build that way.
Renekton was designed to get items with cooldown reduction, but he can't, because either there are not enough or he does have to neglect other important stats like defense and attack damage for it.