Drop new artboard where you want it
In previous versions of AI, you could choose where you wanted to drop a new artboard. Now it just dumps it in the middle of the screen. This is problematic because when you go to drag it to a new location, it often grabs items from existing artboards and drags them along with it. I have no idea why you changed this feature, but it is a daily frustration. And judging from the forums, I'm not the only one that hates it!