We have never had the drinks package. At £100 per day for the two of us, that's three bottles of decent wine, or a bottle of champagne and an excellent red. In the room. If you have to resort to by glass , either brought to room by yourselves or butler, that's a lot of trips to the bar.
If you are going to be eating mainly in room , think about bringing a few cases with you no corkage if drunk in room, think what you can get for that money, you can drink grand cru for same money.