Zpacks just did a product refresh on their Nero Backpack to fix what I have always felt where some much needed changes.
Without a doubt the biggest change is them doing away with the annoying cordage system on the roll-top closure system. It was a serious PITA and I am not really sure anybody liked it. They now have a traditional buckle system for securing the roll-top closure.
Check out the attached video for a complete overview on the changes.
You can see my original thoughts on the Nero in this post from back in April of 2017.