Hi I just saw your project , I have work on several projects in California and can help you to update the drawing set, to show the proposed changes for the second floor
I see that the scope of work will involve updating the floor plan, door and windows schedules, crossed section, electrical and plumbing layout, structural drawings, just to mention a couple of items.
as your new proposal does not show any changes to the design widows your Title 24 energy calculation should still be good.
I can offer you to have it complete within 2 weeks or less because I work with a partner and we can start to work on your project as soon as you assign the job
feel free to contact me for any question or to clarify more the scope of the work
I can also be reach at (323) 521-8368
Best Regards, George