Find the most common pop-ups should instead have their functionality nested into tabs. For example, using multiple monitors with different screen resolutions, importing a list from outlook causes a pop-up. That pop-up renders on the primary screen resolution and then struggles to adjust to new resolutions causing a COMING BOOK WHAM! to productivity. Especially since it's towards the end of the process, you have redo a bunch of stuff.
Solution: Add it to the tab functionality within outlook, then you won't have the pop-up rendering issues.
I'm not a dev though, so maybe that breaks everything else. Just an idea.