Is your database sharding and instance technology going to be geared to more of the hand-held/ mobile devices for players to use? ( Including the new...
Before consideration of upgrading the platform, I believe you should work on membership and 'clean-up' of old and banned/ duplicate accounts etc. and...
Seems to me that most are not able to accept change, they will just complain on PCF for quite a while and threaten quitting yet still remain and lurk...