I actually hunted this thread down after wiping as a tank in Heroic VP last night because our resto druid couldn't cleanse the static cling.
Please, please, please put Nature's Cure in as a required talent. It is far too useful, especially in heroics. Being able to cleanse static cling on the last boss in heroic VP or the fear on the second boss in heroic BRC are the top 2 that spring to my mind where the healer can help prevent the group from wiping if another group member's timing is off or the group makeup isn't ideal.
My bet is that people who wouldn't want Nature's Cure are going to know the specs well enough to make that choice on their own in spite of whatever you post, but many newer wow players will cookie-cutter copy whatever you post and not realize they have hamstrung themselves until too late.