Easy Key Rework (Just Like Your Mori Change)

So, while I think I would have liked to see a more dynamic and balanced method of redoing the Mori, I am just going to accept them as is and move on. I think you should do the Keys in same easy way. You could do it in day simply by altering the formula you have for the hatch becoming visible.

I think the Hatch should not become visible ONLY when all five Generators are up and running. You may now find the Hatch and use the Key. It opens a 3rd exit. Obviously, once it gets to one Survivor the thing will open automatically. This solves the problem and make the Keys useful in niche situation, just like the Mori.