This has gone off topic a bit!
Back to allocated seating:
The only people who dont want it and are complaining are those with plus cards, why not try and think about what it would be like for say families with young children, the elderly etc who dont travel often enough to warrant the need for a plus card but can't get seats together - these are the type of travellers who really need it. Everyone will benefit from allocated seating. Plus I'm sure some people would have a lot to say if British Airways for example announced that they would be moving to free seating - opinions would change then. People like allocated seating!
I dont know what they are going to do with plus cards but I think that what they will probably allow free reservations of seats of the passengers choice and will probably still board them first - they will benefit from this because they will get onboard before the rush of the other passengers and therfore will ensure good space in the overhead lockers.