Great post, I simply said I would have personally signed a known quantity rather than an unknown because he's free, we're opportunists who sign players just because they are cheap as opposed to because they are right for us and it's not the way to succeed. Now this guy may turn out to be decent, but noone really knows and just because he's been in the team of the season once it doesn't necessarily make him top class, plenty of players have been in teams of the season only to disappear and never reproduce that kind of form.
It's basically another experiment by Wenger and he loves those, especially if they come cheap, we could cite countless examples.