I am happy with your current service, as mentioned above except the Royal Mail.
Due to the value of the products, the ability to choose the delivery date or deliver to a pick up point is very useful. Royal Mail despite offering the service, don't actually do it and this week for example, I stuck a note on the front door for the postman to deliver the next day. He told me that the notification system doesn't work so he delivers on the day it arrives. He doesn't get divert, chosen date, or deliver elsewhere info most of the time. Great postmen, just crap organisation!
Perhaps ability to tag order with preferred deliverer?