Finder has a very annoying behavior in El Capitan. Not sure if it was there earlier as well, as I just don't remember anymore. I do know for sure that Snow Leopard didn't have it, and that's just how I like it.
What I'm referring to is the frustrating thing it does when you attempt to drag a file from one location to another, and needs to "open" the target folder before you successfully move said file. Why can't I just drop the damn thing on the representation of the folder instead of this much slower and much more annoying way? Needing to navigate back to the origin folder gets old, really fast.
Either this is some weird defect in my installation of El Capitan, or Apple decided this was a great idea at some point in the last two years.
I disagree with Apple, if they think this is good.