Python API wishes

thanks for improving the API so much in the recent updates.
Unfortunately I already ran into new limitations on recent projects.

My wishes:
- Give us access to Get/Set the clips playhead position on media_pool level (important in correspondence with the slate_tc function).
- Give us the option to retrieve lists of all preset types (currently only available for resolution and render presets). The goal is to have a script exporting -all- presets in one action for frequent workstation changes.
- Give us the possibility to Get the currently slected item(s) on media pool level.

Thanks in advance!!