QoS settings on your local router only affect upstream (from your home to the ISP) packet ordering. Anything you do there will have no impact on packet queuing/ordering downstream (from the ISP to you) - this is being performed by your ISPs gear. Downstream bandwidth is commonly larger than upstream bandwidth, so this problem is frequently hidden - but if you have lots of data coming down, no QoS settings on your local gear will in any way impact the priority for packets coming from your ISP to you.