I couldn't agree more, Giroud is very underrated. He goals per game last season was exceptional not only for Arsenal but for France as well. His hold up and link up play is second to none and he brings players like Alexis, Walcott and Ozil into play. He has to stay!!!!
He is world class in my opinion his hold up play is second to none his goal ratio is excellent as you said. Lacazette has big boots to fill if he thinks he's going to replace him that easily.
There is a reason why hes kept him out of France squad