So you voted for a rep who in turn helped appoint a committee which in turn appointed a negotiating team. That's what we call democracy in this country. Just how seriously do you think the company would take the union if it had to refer every last suggestion to the entire membership ?
And if the solution is jointly agreed as the best possible solution why shouldn't both parties present it ? Surely both sides should be prepared to stand behind the solution they've reached.
And if NATS puts up people not up to the task then perhaps the union has to step in to save them. The alternative might see the best solution overall being rejected because of management incompetence and that may not be in the interest of union members.