An observation from a newbie Oxygen user with experience in other XML editors: I find the default appearance of tags in Author mode too intrusive. The tags are too visually similar to the content.
I have customized the appearance in Options ► Preferences ► Editor ► Edit modes ► Author ► Tags:
- Tags foreground color: (R:102, G:102: B:102), a mid-dark gray
- Tags font: Arial 11 pt
I know that users can, as I have, customize these settings. If you, the Oxygen developer, change these defaults, you might well get howls of protest from users who are perfectly happy with them. But I thought it was worth noting that, as a newbie user, changing the appearance of tags (like adding keyboard shortcuts for various Document ► Select options) was something I felt I needed to do out-of-the-box, as soon as I started using Oxygen. Then again, I'm just one user; it's entirely up to you to consider and weigh this feedback on its merits.