Unrelated to the redesign, but the documentation for things like Actions just scream "microsoft." It was really hard for me to find the important information; had to sift through pages of abstraction gunk where things aren't explained clearly or with code. Felt like IBM product pages. Very non-github. This clueless internet-explorer-type design trend will almost certainly continue IMO. They simply can't help theirselves.
Unfortunately I also don't like gitlab or bitbucket. Github circa 2012 was the gold standard for the design solution, while everything else was cluttered or pad-y or overreliant on side navigation. Now everything sucks.
What's sad? Actually, you can find the classic (good) github design alive and well in China: https://gitee.com/drinkjava2/frog