This update has wrecked my phone. Nothing is the same and cannot be rectified via screen zoom or font size, .when zoom is set larger, text etc is too big whilst the notification bubbles show small text, really annoying. The calendar doesn't show an underline on events etc. I can go on and on but don't have the time to write. If I flash device back to the last UI3 Samsung will only relentlessly give me notification to update!!! I'm really annoyed about this update.
The calendar will show a more detailed overview if you swipe down on the Month view. It's not quite the "at glance" thing we had before, but it's better than Sammy just leaving us to click on each day individually to check for events.