This whole discussion is academic, of course.
Every person's financial situation is different and what suits one person may not suit another.
I'm not so sure that I agree with you with regards to the pensions and RAs being all RSA though. Most pensions and RA plans have 30% directly offshore, and the 70% that is left is usually market capped, so your Naspers etc. weigh heavily with quite a lot of indirect offshore exposure, bringing the actual offshore exposure closer 50%.