Jungle Assassins and Youmuu's

Riot, please tell me why you removed crit from Youmuu's? It really hurts the early games of Rengar and Yi based on how crit made their Q's have a better spike. And on top of that you also increased it's cost, which can not be as easily gained in the jungle now and makes ganking for them rather hard. Could you please elaborate on the changes and maybe at the least change the cost to perhaps 800 gold? That item is just so core because of the active, CDR, and armour pen that I couldn't just swap it out for a Stattik Shiv early on these champions. And yes, I do know that Warlord's would play some factor with crit being on Ghostblade, but it's relatively small as it's not always there like on Yasuo or Tryndamere.

I at least propose lowering the end cost to 800 gold or perhaps keeping it the same but re-adding crit by having Cloak of Agility in that item? You could then shred off 10-15 AD to make it relatively balanced with that change.