Barring new developments, I think it's fair to assume that PMCO systems & policies listed by channa are what we'll be dealing with come March changeover. We can all hope they'll improve over time, but this is what we'll most likely be stuck with - only smart practice to familiarize oneself with the limitations/changes - I've learned all about the joy of WL'd upgrades, EUA, etc.

Resounding silence on positive changes/aspects of SHARES - ability to have travel credits online is great, but not familiar with anything besides that.