If the pack is merely swollen a bit, I'd smack it and see what happens. If it is so swollen it looks like a beach ball about to pop, then it has already been smacked. Either way, I suggest a starter to see if you can up the numbers and make the yeast healthy again before pitching. Or get fresh yeast.
As for the recipe, it will be interesting, for sure. Not sure about all the sugar and molassas and no pumpkin. I might be pretty good though. No real way to know without making it and trying. Or you could drop the sugars and molassas. The beer will be a bit weaker, but more malty I would think. If you need the alcohol content, add some more DME to compensate for removing the sugars.