Some of those swing passes were or were pretty close to being laterals. Fortunately, Garbers was able to hit the receiver right on stride.

Assuming that it's not designed that way, is it the fault of Garbers for not dropping deep enough or the receiver for dropping too deep?

Good question. The ball also has to come out faster. Mcllwain can zip it out there, it seems Garbers needs to work on it more.