The best solution Phase would have for both, is the Alpa FPS, as it has quite a lot of capabilities. I would not be surprised to see a future product more closely integrated with the FPS in the future, maybe even at Photokina. Allowing both the FPS and a leaf shutter in lens, maybe an electronic version also.
As I am an Arca rm3di user, can't afford to switch. Arca has a similar solution, which was announced at Photokina 2 years ago, so far only the Canon solution has shipped that I am aware of, (Chris Barrett is using it) However I doubt that Arca will ever be able to use the EFC on the IQ100 due to comm issues. Where are Alpa/Phase may be able to work out a solution.
Paul C