So often the interface of floor coverings at door thresholds is left to last, and comes as a hurried detail, when if just thought about the detail can be well presented and usefull.
There are loads of different ideas to call upon, from simple timber strips to line through with the door jamb, to slim metal strips.
Traffic use often is ignored, and I shudder when I see wispy metal strips in a doorway that has had some hard use, and the metal is damaged bent, marked, buckled.
So as a thought, why not open up a line of detailing within Evernote and collect some ideas on how others have dealt with the problem, and perhaps sketch out some ideas in your moleskin and again transfer it to Evernote, together with some notes, I have on occasion used the dictation tool and the recording tool to do this.
Again this is not one of my details, but one I have “collected” but it serves to show what I want, and is a good reminder, of a nice detail, I have a lot more collected in Vectorwork steves bits file.
This again is good detailing CPD, revisiting old details, or just making notes of details that are in use, I often have to go to London and the steps and expansion details for their underground system are classic examples to look at.