If anyone here knows some detail about SQM on OpenWRT, you may be able to help me. Recently I installed SQM and all is well and works pretty much exactly according to the guide. What I'm curious about ...

I upgraded my Archer C7 (v2) to use OpenWRT, and while I've overall been much happier with management and features over the stock TP-Link firmware (I finally can have IPV6 now), throughput has issues.