Got the car back, zero change in driving feel and or throttle response or anything else. So, all good. You get a certificate and a sticker on the door as well as electronic notification to the CA DMV. In theory, you don't need the certificate, but it's given as a precautionary measure in case the DMV doesn't show the electronic record.
Separately, the wire harness fix seemed to do the trick. No more intermittent turn signal error. Also, they get to it through the rear wheel liners. All work was very neat and tidy. Lotus of San Diego is my preferred dealer in case anyone wants to know.