It doesn't benefit from lethality. It doesn't stack bandit's guile. It doesn't have a chance to proc an extra cp. It resets your swing timer. It's really not even close to overcoming its issues. Combat has enough energy generation as it is that adding a 15cp cp builder to the rotation would lead to capping.
It does not resets swing timer, but it does stop autoattack. However, if u macro it with /startattack, it wont reset swing timer, wont affect at all.
For all of the other, It does not stack bandit's guile, this part i know.
I never heared anthing about proc extra cp, so it could be true it doesnt proc.
For lethality, some of my friend test it and told me it does benefit from lethality, just not writen on it.