A voting system for ehf token holder can be a good system I think, community always like to be listened, and the sucess of a crypto currencies is also due to the community behind it. EHF can build something around that I think.
It really depends on what is being voted on though. For many aspects of the project, like what is being developed, I would like the professionals to make the choices. But for things like token usage you can ask the investors/community.