I think the biggest failure of the system is that the skills that use it were chosen poorly. It shines much more when on utility skills. Some examples being triple cast, Thunder clap, and an advant.

I think the way they work in the mch kit is mostly alright to, even if the animations are all over the place. You're never really overcapping or waiting for burst.

Skills like spinshatter and shadow bringer don't really need the 2nd charge., and I personally think it hurts the jobs these skills are attached to.