You are probably very right regards the OTA (payable) update for the heated steering wheel. I have to say that would be disappointing though, given the UK&I cost of the Performance vs other European countries.
I think the Uberturbines will stay for UK&I, at least for now. I asked specifically about the Uberturbines, and although the Tesla account manager did not address the specific question, he did say the car would be as per the attached spec (the one available on line for UK &I) and would visually look the same - including different accents on the doors, steering wheel - but keeping the Uberturbines which were both specified, and included in the photo.
I wonder if this accounts for the delay? I.e. effectively they have one RHD spec Performance and a LHD Performance for China only. This might account for the delay until May, for them to ship components such as wheels / batteries etc for the RHD spec? Just a theory ! But if the spec was being kept like for like between Chinese LHD and RHD, I cannot see it taking 4/5 months effectively to change operation just to switch some production from LHD to RHD. My theory is two slightly different specs.. for now ! What do you think ?