If that's the limit of improvement we are looking for then we really won't be winning anything. What will improve us is Giroud coming on at 75 minutes with that much of the match played by a much better center forward.
I don't have a problem with Remy, infact I used to think he would be a great buy when he was at Marseille. He won't really improve us much though other than adding squad depth. We need a striker for the first team.