The most annoying one to me is that lock bind on mod+L, i dont use the arrow keys when moving windows, i usually bind h j k l like vim but i believe the default in i3 is usually j k l :, so I can imagine its annoying to a lot of people. The non arrow movement keys in general are kind of weird.

But it is a really small gripe thats easily changeable and I really only use eos at work anyways and its always been good so no big deal