With the event starting at reset, you no longer need to give notice. Agreed you can't do contests at reset, but those you can give notice for instead.
You can only "hoard" 1 expedition, and frankly I always run with 1 expedition stored up for events anyway, and everyone can do this almost without effort, so I'm not sure what the objection is.
Stamina, again, there's only so much you can hoard, dependant on your level. Mines something like 177 curly, and if I could be bothered enough to do some very basic maths, I could always leave it so that I have maximum stored stamina upon daily reset, ready for any event. So again, what's the objection here?