I wasn't aware of the current gedcom import process, as I do not import in gedcom's, but would like to provide some feedback from the perspective of what happens when a new member attempts to add people already created on wikitree. And also I suspect many other active members don't realise this is what happens.
Firstly, I received a change notice on the e-mail newsletter I get as I follow changes to some of my rarer surnames. It had a comment that read "Imported data from GEDCOM upload #184439, Person P307". Which on first read, didn't make a lot of sense. Perhaps this could be made a bit clearer and friendlier? maybe Imported data from GEDCOM upload #184439 may have added extra information to this profile, which needs review?
Secondly this import over wrote the birth and death dates on my profiles with baptism and burial dates. The profiles were fully sourced so it was easy to spot, but an automated process couldn't spot this - unless we had a baptism and burial date field. Or would it be possible that when a gedcom matches an already exising profile that it not overwrite the birth and death dates? it could just add them suggested changes in the notes to be reviewed.
Lastly where a profile already exists and a gedcome attempst to bring it in again, could the gedcom process not put a statement on existing profiles saying the profile was created by the person who is importing in a gedcom?
I think if you know the above issues come up as part of an automated process its pretty easy to fix them as long as you know they have happened. But, if you didn't realise it was part of an automated process it would feel like a new wikitree member wasn't reading the biography you had written, so was deliberately introducing mistakes to a record you created and was then claiming credit for creating the biography you had written.