There's no right or wrong on this issue. The club can choose how to allocate tickets in a number of ways, none of which have moral superiority over the others. The club are choosing to make away ticket allocation a perk of buying a season ticket.
As it has always been. And as it should be as season tickets provide important and predictable income. Fans who have season tickets AND travel away a lot will still always have the best chance of getting tickets for big games. Not keen on the ID plan at all - but it's surely only an attempt to make sure the most deserving fans get first dibs.
I can't see why many who feel they're in that category are so against the concept - even if the method is all a bit 1984.