Other information they shared is that they expect to get the new software to be fully deployed starting November.
The other thing they expect when I mentioned them that the number of platinum will be huge till December (match with gold) it's that for them, marriott guys will continue to focus with marriott and spg loyalist with spg... I'm not sure that will be the case, but for them upgrade availability will be same as before. Let's see how things goes during this transition time.
But what is sure it's that because of the fact a lot of ex marriott gold will be able to become platinum more easy than before they will focus on the returning guest and ambassador + 75 more than before.
It's a feedback from people working on operation, not sure Marriot gets the same analysis, but at least it give a data point from insiders.