It was fun and sassy against Wood Elves and a surprise for most opponents who had no idea how to deal with one for awhile but with the coming of the new combined chaos armies and eternity king lists, we will be facing more firepower on a regular basis. Every chaos army is toting double skullcannons and the elves are running more RBT's than ever so I wouldn't field one. Of course, if your meta isn't like that, than it's a different story.
I did not see it appear much under storm of magic, and was not overly tempted to run one myself. As such, I doubt it will feature heavily under end times magic. Especially when you could be spending those points on, say, a heirotitan and/or mortis engine, allowing you to really crank out the spammed invocations.