Thanks. If my answer solve
your issue please close this topic (For future searches). The idea of randomize and so on is separate issue (You can add separate Q)
Quick review:
filtering
** No filter feature for the slider yet
Randomize
Randomize is “build in” (For collection list):
For slider you find her the direction:
Filter by date range
Only show one item per day - “CMS limit items”
Only show on item per day (built in- CMS) - for the slider widget - no way by the UI to filter (only custom code - anyway its weird to create slider only with one slide)