The irony is that raiding is still viable with it, but no other use is anymore. All you need to do is train 2x as many of them for the raid and send 2 at a time, at 165 oil still not a big deal.
They should have just given its airspace a no-enter zone so you can't stack them together. Really, most of the higher end bases defend against unstacked TH fine, it's stacking where they become indestructible, and stacking multiple TH in a real attack would be a waste of troop space.