I did change the recipe slightly. First, I cheated and used refrigerated ready-made dough (one day I really need to try and make my own crust, but the instant gratification of the boxed kind is so tempting!). I did made the filling as called for in the recipe. For the crumb topping I omitted the oats and used chopped pecans instead.
The day I baked them they were delicious, but by the end of the next day, the crust and crumb topping was getting a bit soggy and I couldn't really taste the peaches. This is definitely a recipe to make the day of. I like to make desserts a day or two before the party, so I might do a follow up with a different recipe for the filling to see if it does better the next day.