It's enough to pay, don't you think? I'm more than happy with my £25 ticket. If I was paying £55, I'd want to pick my seat - as opposed to some "pig in a poke" lottery.
Looking at that photo in the sticky... it looks like the £25 seats aren't bad at all. For example, the front row of the upper tier is no further away from the action than the back row of the middle tier (because of the overhang) but benefits from the extra height. So if anything, it's better. It looks to me like there aren't that many bad seats in the new Wembley, as opposed to the old one which had plenty.