Over the years I have pared down the number of dishes on the Christmas table. Do you really need all those vegetable dishes when there is turkey, sausage meat, stuffing etc?
I stuff sausage meat in the turkey, cook a gammon joint the previous day and reheat on Christmas day and then just do turkey, reheated gammon, stuffing, roast potatoes, sprouts and parsnips on the day. Cranberry Sauce comes from a jar but, if making your own, make it several days in advance and keep in the fridge.
Like you I prepare everything in advance. I retreat to the kitchen when the Kings College carols start at 3.00pm and expect to have the whole meal prepared and the table laid by 6.00pm. Christmas is for me to enjoy as well as my family and I refuse to martyr myself to make a family Christmas.