What about a match frame indicator, where an Add Edit shows that the footage on both sides of the edit is sequential?
In Premiere Pro, you can use the Trim Monitor for that. Kevin Monahan has a great blog post about using the Trim Monitor:
In the timeline, if you use the Ripple Edit Tool (B), the Rolling Edit Tool (N), the Slide Edit Tool (U) or the Slip Tool (Y), then the Program Monitor will give you a two-up or four-up display while you adjust the edit.
When using drag and drop to add a clip or move a clip in the timeline, either with the Command key pressed for an Insert edit or without the Command key pressed for an Overwrite edit, the Program Monitor will display a two-up view to show you the frames involved at the edit point.
Can you add comments to a Clip Marker? Or is that only available to Sequence Markers?
Nope. Only for Sequence Markers.
Dupe detection in a Timeline?
You can find that in the Project Panel by examining the dropdown list under the twirl open button in the Preview area for a selected clip. Read here:
What about ability to Search the Timeline for text, comments, etc?
If you've logged comments for a clip in any of the available metadata fields for a clip, then a search in the Project Panel will reveal all instances of any clip that has metadata that matches the search text. Again, you search the Project Panel, not the Timeline Panel.
If you'd like to see any of these features added or improved, please file a request here:
Thank you for confirming what I suspected. These features are not implemented wisely in Pr. They are poor substitutes for a better way of working.
Feature requests submitted.