Theres a few points in fights where id want a 1.5s cast time, and not even for weaving. And honestly, id be ok IF it was ONLY attached to Jolt.
It would give you an additional reason to use jolt, outside of not having procs (which you should "usually" have.)

The rest of what you said, I'm sure someone would have something to say to those, but I'm just not really seeing much to say about them.