I don't think all the UI actions have been implemented in the new UI yet. Please see this article for additional info:
Since 2017.1 and 2017.2 were patch releases, not feature releases, it is safe to assume nothing has changed from 2016.2 when this article was written up through version 2017.2.
Many thanks Jonathan! Is there any way to know if updates to these UI actions will be included in 2017.3?
I'd start with the uservoice portal where you can log feature requests. I'm not sure if there's any release planning info listed there or not. Since those are handled outside of support now we don't have the visibility on planned release versions any longer.
Beyond that, checking the new features list when the release notes come out will be your best bet.