Such as, the Plus is a large phone so you most often open it with the phone tilted somehow, giving you landscape mode. It does not easily revert to the upright state without juggling it around, nor is there an option to not go landscape on the home screen only (seriously who needs that?). It's not even in the settings menu to disable rotation entirely - you have to find it in the pull up menu.
Another gripe I have is that all the pull up and down menus also trigger when you don't want it. The screen has gotten really sensitive, which is great, but there are lots of unintended effects now.
A fanatical user running the company wouldn't have overlooked this.