Minion Instability not enough of a keystone

I think, as described, a keystone should really be game-changing instead of just being something minor. Also, the MI keystone has no negative effect (which I think it should). I picture MI as being a way of building a sacrifice build to where your minions are almost like an activate spell you use to send at your enemies just to quickly suicide bomb and then re-summon new ones. It would be great if you could use curse on hit on the minions. It would also be great if you could tie in the new unique item, Shackles of the Wretched Chain Gloves, with this. This way you could have your own minions cursing themselves, making them die more easily. I just tried without success to make all of these things work and I was disappointed by the results. Just an idea that I thought would be cool.