I plan to do so
I plan to do so within next 30-60 days if I don't get anything back.
The crucial moment for mandamus, you have to demo to judge that you have exhausted all available (non-judicial) options to resove this situation, e.g. requests to USCIS, requests through congressman/senator, letters to finally do namecheck to Hooton/Cannon.
Judging from the quotes I am getting right now, i am looking at the amount between 1500-2500$/legal fees+250$ filing fee. I will keep posted.
Btw, looks like it is unclear if you can use mandamus against overseas consulate.