[Inconspicuous Kitty]

There's a lot of classes that can qualify as 'SP sinks' - for example, Summoner has quite a few innates, doesn't it? Demon Hunter, you can only get one or two stances done well, etc. I don't think decreasing the SP requirement for skills that are already powerful in their own right, scaling with the points you put in them. If SP sinks are an issue, I don't think this is the way to go about them - you need to keep in mind, usage of SP to get skills is a limiter on it's own, a method to keep players in line and not becoming too powerful.

I just feel that making the skills easier to obtain isn't the way to go about this.