I’m wondering what you mean with “a master branch”, Epics own solution is in the master branch on github. There is only one master branch, and currently master is what will be 4.17. The volumetric stuff was added when it still was 4.16 though, so in the 4.16 launcher version it will be included.
I agree with the others that you should wait until 4.16 is released. You also don’t know yet what limitations Epics system might have regarding features and performance, so don’t remove yours from the marketplace before you can be completely sure that no one benefits from it.