Why was Shen's Taunt Cooldown increaed by 2 Seconds?

I definitely noticed this and I think it's terrible. So many times have I fought someone whittled their health down so much, only to have them run away and not be able to secure a kill cause I no longer have a ranged attacked (Vorpal Blade). Maybe if Taunt had a lower CD I could engage them a second time?

Lower The Taunt CD.