there are too many Platinums - pushing Platinum qualification up is the way to go.
Which means more people may leak to VA and various international carriers, which doesn't help the airline.
Although the did recently push it up a little for retaining platinum (vs attaining), so maybe that will work.
The loyalty machine is not designed for the benefit of passengers, it is carefully lubricated to provide enough benefit to enough people enough of the time, with a bit of tension built in, to maintain a strong share of people's travel wallets, and extract a few more dollars than otherwise be the case - be they company, personal or mixture of both. Until such time that there is significant leakage to other carriers because of things like overcrowding, then I wouldn't expect increasing the platinum qualification (any more than they already did this year), is going to happen.
