I did make one layout change initially during first week of my order and surprisingly that went quickly. I ordered on 7/28. Everything else went downhill after that. The first permit they applied with L.A County was rejected 3 times. In fact the first permit didn't even have the 2 powerwalls I ordered so Tesla cancelled it and applied a second permit with all details on 9/11. LA county rejected the second one also and now waiting for Tesla to submit the corrections. Its been frustrating .. I will PM you my cell number as you live in SCV too. I am surprised you got a text saying permit approved. Not sure how thats possible when you have not submitted esigned documents including the changes you want in layout. Must have been an error.
I'm not sure why I got a text saying "We've received your permits" when on the Tesla website it still says we're reviewing your documents.