One would hope that in the fullness of time there will be only one standard of UK licence (be they PPL, CPL or ATPL) that are compliant with both ICAO and EASA.
The issue of morphing LAPL and NPPL into a “UK PPL” could be dealt with by having ratings on that PPL which define the privileges that LAPL and NPPL holders currently exercise.
Oh, and I would like my lifetime IMC rating back too whilst you’re at it.
It would be nice if it could be done in just one move on the chessboard, but quite a few moves might be needed to get to the final position.