Yeah it was obvious he wouldn't be back in a week after being subbed like that. He's getting close to Wilshere levels of injuries now and worse he takes ages to get back to a decent level. I still had hopes he could become a useful player for us earlier this season even if he's not as good as during his purple patch but we really should look to replace him soon.
Actually we should replace Wenger and everyone related to him at the club first and see if Ramsey's injury issues don't get better. There are extreme cases like Wilshere and Diaby but I'd be surprised if Wenger's dinosaur methods don't have anything to do with our consistent muscle injuries.