No, I don't believe so. Everything that was done with Vote Leave and BeLeave and the others was all publicly reported. In that respect, I don't think there's any problem there. They could certainly look at their electoral laws and whether they're appropriate or not, but that's for them to decide.
With respect to the use of the Internet, there are some genuine concerns. People can advertise from anywhere in the world. If the advertising platform let's them do it, they could attempt to advertise during an election without having to meet spending limits, or whatever it happens to be. However, Facebook has already put in place measures to prevent that. I imagine other advertising providers will be doing the same.
There is certainly more work that can be done. I'm hopeful that will happen.