The government has rightly said that what the voice exactly looks like will be decided after the vote, because there’s no point putting the investment in (both in time and funding) to flesh this out, if the public doesn’t back it.

The specifics to the level you’re asking, in my opinion, make no difference to how you vote, with the exception of “Will they have power”, and that has been answered - the voice is to be consulted and their feedback collected, they have no power to enforce anything, but consulting them really is the least the government should do.