From what I've been able to gather, there will be no APP land transfers, at least from the info in the AIP... all of the park will remain a park. IIRC, there are other Ont parks or pieces of them that will be transferred so they might change. And some new parks lands will be added into the parks system as compensation for the loss. Still, all this is not a certain thing until the final agreement is approved and signed.
Access to fish and wildlife, and harvesting, is more likely to be an issue but since roads are known to be harmful to ecological integrity and since it's agreed that EI is the most significant priority, at least in the AIP, it'll be interesting to see how that's resolved as time goes on.
Stay tuned, lots of new developments are possible... (pun intended).