Currently you can filter on:
- Timesheet status
- Resource name
- My team (resource manager = logged in user)
- Time period (only one can be selected)
In the old UI you can filter on a bit more, i.e. OBS or resource status
As you've probably noted, once you activate the new timesheet you can't access through the old UI.
So consider with your users if any of these filters lost are important to business procedures.