To be honest a better version of Giroud is what I would expect him to be. Whether that's enough is a different question, but the image people have of Giroud since he left is warped.
Anyway, this rumour is a weird one. The opinions of him differ from thinking he's not good enough for us to thinking we'd be an unambitious move for him because he could play for better clubs, and I don't even see a trend in which opinion is the dominating one.