Unfortunately following any change there will always be unintended but also some surprising consequences. As Donald Rumsfeld put it, there are: "known unknowns and there are also unknown unknowns; that is to say we know there are some things we do not know".
I also learnt early in life to never ask a question of the unknown if there is any possibility that you will not like the answer. I agree with Edgington. I presume you will be taking up the current offer from the UK CAA to have a UK licence and ratings issued for licenses that were SOLI'd and if so; simply apply for the instructor rating certificate to be issued at the same time. Don't raise an issue unnecessarily.