A change to how Hireling deliveries (and the Dark Brotherhood Shadowy Supplier) would be a profound Quality of Life improvement for players, especially those with multiple crafters.
Currently with the 24-hour timer, the schedule inches forward constantly due to login/service issues (like the one we just had with X-Box on July 24), in-game mail delay, connection issues, in-game activities with guilds/friends, and even scheduled maintenance.
Ideally, dropping the entire delivery into the Crafting Bag automatically without logging in at all would be great.
However, a simple change to 20 hours would mean players can adjust more easily back and forth at what time they pick up the delivery. An interruption one day can be remedied without having to push the entire schedule forward.