I assumed you meant the hosts are queueing in the kernel because their userspace consumers can't keep up. In that case, XDP can help, because it can drop things out of the rx ring buffers before the network stack and later userspace spend cpu cycles processing them.

If you meant the router is queueing because it's receiving more traffic than the sum of its downstream link bandwidth, like a raw static spam flood DDoS, I don't think the hosts can't do anything about that.