Sometimes you're trying to just gather some Intel or Supplies and five other notifications bombard you on top of research being completed and a facility being built. Little things really impact my enjoyment in big ways, like the need to go pick up Supply Drops. I know that hardcore players may give me grief over this, but there are times in XCOM 2 (vanilla and WotC) that I stop having fun and just feel overwhelmed.
That's one area where I wish War of the Chosen had done more to change.