I have less problems with the subscriptions, but with their proprietary file format. All I want to do is edit text files and maybe convert them to blog posts. It's impossible, since Ulysses doesn't seem to support batch exporting multiple files to Markdown.
For pure writing, I use iA Writer, but its library/organizational features are lacking.
Since I have no Apple hardware except for a work provided laptop, I don't use Ulysses' proprietary format. I just have a folder (that's in Dropbox) with straight .md files in it, and have added it to ulysses. After the Evernote mess, I don't want anything in a proprietary format.
Plus, since I'm cross platform, with different apps on each platform, I don't have a choice.
You can use Ulysses in the proprietary format or open regular .md files. I have a folder open, so I have multiple layers of folders. It works pretty well.
The proprietary is required for iCloud (if you want to share notes with the iOS app).
For pure writing, I use iA Writer, but its library/organizational features are lacking.