Not a bad signing. It can't really hurt the team, but it does seem like we are just adding quantity over quality. Oduya is a bottom pairing guy. So now we have Karlsson, Phaneuf and then a bunch of 5-6 guys. He is not a replacement for Methot.
That said, adding him to 'the system' should help out. He could be serviceable and I can honestly see him playing with EK to start the year. He will be a bit out of his element, but if EK can win a Norris playing alongside Kuba, anything is possible. Oduya is a better version of Kuba.
The part of this I like is that it probably means they won't rush Chabot. Unless of course, Oduya doesn't gel, Phaneuf gets even slower and Ceci doesn't improve. Then they may have no choice.