Is the other half being sent out after Dec 1st?
I think they'd resume as early as sometime in next week since Dec. 2nd is the last interview date that they have assigned so far. It won't make sense if they send you an invitation for Dec. 5th on Dec. 2nd. Assuming that they'd give you at least a week to prepare for a trip, they should send out a few invitations sometime in next week.
Of course if they decide to skip Dec. 5th, then it's possible that invitations will be sent out after dec. 1st.
Dec. 5th is a go! They just sent out invitations for it today via email. So so excited - keep your hopes up everyone! There are still a lot more interviews to be offered since they haven't offered enough interviews to fill their class yet.
Oh, and I submitted AADSAS in mid May and my secondary at the end of July / early August. DAT was mid June. So, no they have not already overlooked you if you submitted it early - I thought that too.