I agree with most of the things you stated here. Demonic origins should change position, or maybe put it back in pvp talents and that’s it. Perma 15% haste is perhaps a bit too much.
Another thing I don’t like is glide as part of momentum. It didn’t catch my eye right away. Imo felblade should replace glide here, because glide will turn momentum into a 100% uptime braindead gameplay where we will use glide/cancelaura macro every 6 seconds. Not only is it braindead, but it looks stupid and will become tiresome over time. Felblade might not change the uptime drastically, maybe not at all, but at least we won’t be using idiotic macro every 6 seconds but a dmg and gap closer ability that can also fit nicely into the dps rotation (especially with demon blades talent).