I think everyone's working on the assumption that as EASA is underfunded and understaffed, nothing much will really happen to the regs.
If you only hold a CPL(H), you will have to do the IR theory to get the full ATPL(H). Otherwise it can morph into the ATPL(H)(VFR) if you ask nicely.
If you did the proper ATPL(H) TK before, that includes the IR.
FYI, there are no plans to do special exams or courses for the VFR ATPL, they will be produced on request from schools. Interestingly, it would appear that the "new" CPL(H) (with a lot of stuff missing) together with IR will still count as the equivalent of ATPL(H), so you will not get to study INS, the Super Puma in M & B, many other items, and still get the ATP.
Strange
Phil