One thing entirely left out from the whole "strategic diversity" thing...
Phantom Dancer. Every standard AD carry (not blue ez or triforce users) gets shiv over phantom dancer 99% of the time and this has been going on for about 2 seasons now.
First big reason is the cost (300g cheaper and avarice makes it even cheaper than that depending on how long you sit on it) and much faster powerspike, other reason is that it's really just better until super super late game (I can't even argue that PD is much better than shiv late game either).
Either make PD an avarice blade upgrade or change the cost and/or stats to make it a more viable alternative to statikk shiv as a second (or whatever) item.