Here is where the new tools come in handy...
You can really change the way these consultations are done
Instead of individual replies to surveys, have them in public (we can all see what others think on issues), and track to what extend the views expressed that get the most support are taken into account. (that is one way of doing it)
You are right that consultation is usually made to convince people there is one, and thus legitimise what ever decisions are made, as being made "after broad consultation"
That can start to change ...