If you have requests, I suggest waiting until you arrive at the resort.
One of the items that is required is your time of arrival. The room assigner designates a certain area of the resort a few days before arrival; with the new computer system, the CM chooses the earliest available room in inventory. It may not be to your liking, you reiterate your requests and then they have to redo your package. Best to do regular check-in and tell the CM you will wait for the room that meets your requests, if they are able to do so.
If you don't mind being in the first available room, go for it. It is a very quick process, especially if you arrive at a busier time of day. However, if you have requests, I don't suggest you do it.