Google search "Clash of Clan Wallbreaker" and you guys will see how bad WB used to be... which was horrible.
And after that improvement, you guys are ranting as if it never happened?
Most people don't even know
how WB target, and then complain about them being broken while not understanding the basics and just assume they know how they should be.

(again)
Much of the problems people run into is lack of situational awareness. The wondering off problem is likely due to two things. 1) Not realizing a base builder purposefully made the base to direct WBs how they want them. 2) Not paying attention to what targets are nearby.
I have done some long range target deployment to take out.. say a TH, by making sure the nearest thing to the unit is the TH. I have had battles lost when attempting this because one building, like an Army Camp or Builder's Hut, was closer, but off screen and... there goes my CC dragon, flying 90° off target... to overcook a bovine on a spit.

...
Now I have a simple idea that could fix much of this counter intuitive AI behavior. Making a thread... after checking the forum if it was said before.