Doesn't that tell you something thought?
If I was searching for a GM, I would look for a guy who can consistently find me gems during the draft. There's too many people giving input into FA acquisitions - it's hard to solely give the Ditector of Pro Personel the credit. It's not surprising that HCs (as we have heard about Rex, and Hoodie) have a great eye for pro personnel talent. It's their job to know who the true players are. They game plan against them weekly.
That said, I highly doubt our acquisition of FA talent would suffer if Monos left. It may even improve, because it's been difficult for us to identify offensive talent.
I still have my doubts on Rex's ability to be a HC, but I don't doubt for a minute Rex has an extremely keen eye for defensive talent. He's no one man show, but he's likely the driving force behind these signings.