Never thought of it from that angle that Dinan too might limit to certain lines. My reasoning was that if BMW indeed decides to limit the PPK to just M-sports it would be primarily for some kind of marketing reason, a reason that Dinan would not have.
Good to know that there is still some hope for the PPK, just the wait is crazy! I remember when we were all waiting for it to be released on the first week of November, then it became December, then March and now I hear June. Sigh