Hi Ryan,
Good to see that I'm not the only WF admin thinking about this.
I had a similar thought around pre-populating the request title for a specific path with what it should be, as a way of reducing friction for the requester.
I was asking Workfront's support team about this, and it appears (from my own research) and the limited information they gave me that it's not possible at the moment - which is quite frustrating and disappointing.
Looking at the DOM for the requests screen - it seems that all "core" request fields have an ID, so not entirely sure if the reason for not implementing is a security one or not.
Would be curious to hear if anyone else has put this to a product manager in the recent past or not.