Shined up real nice.
Redirects the new post page to the classic post page
WordPress.com has removed the preference to edit posts using the classic interface. This user script forces a redirect to the classic interface when the new edit interface is visited.
If you don't already have one, install a browser extension that allows you to run user scripts. Then, visit the URL below:
Also on Greasy Fork.
If you don't like this script or can't use it for any reason, there are other workarounds available.