In the existing legislation which is the basis for the new plan, there would be a board made up of 13 seats. Only 4 would be allocated to the major carriers. It's hard to see how the 4 members from the majors would be able to dominate, and sway the rest of the board unless there is a lot of side dealing.
The plan in place in Nav Canada charges GA planes based on weight if under 3 metric tons, and the average fee is around $88-98 USD. Sadly, there is the 'camels nose under the tent'. What is ~$100 today, could easily be $1000 in four years, or $10,000 in ten years. After all the GA community has zero voice in govt so it would be easy prey for overcharging.