@Rob,
I tried your steps on an Ancestry female profile.
Here are the results I got:
1. It put the first name in the the "First Name at Birth" field correctly.
2. The middle initial was placed in the Middle Name field, but the period was deleted after the initial. I don't want it deleting the period after the initial. It also placed in the Middle Name field the LNAB followed by the first surname of the first marriage. It took the last surname of the second marriage and placed it in the Last Name at Birth field (which is wrong).
3. For birth month and death month, it is entering the three letter abbreviations in all uppercase instead of mixed case. Not sure how WikiTree handles that. I always enter it as mixed cased.
4. In the notes section, it doesn't have the period after the middle initial (which I would want) and it added dates for the parents, which I don't want.
5. In the sources section, it added the Ancestry Tree profile template.