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Freshly designed emails have been out little over a week now. Perhaps you've seen them!
This is an example of an email you'll get if you've opted to get notifications when someone comments on your Pen:
The new designs just reflect a more current CodePen style and tone. They feature user avatars when appropriate and use the icons we use in the RSS feeds and Activity area.
Like we did in the original designs, we went "mobile first", making sure they look/work fine on small screens and then just widening them up somewhat when the room is there.
We have more improvements to come, like including image previews of the Pens when relevant, which will come in time.