I have the Witi Router working now with SQM-QoS – the bufferbloat-fighting technology that has been implemented in OpenWrt. Read more about Bufferbloat at Bufferbloat and the Ski Shop.
Demetris has made a build of OpenWrt Chaos Calmer (15.05) that has SQM-QoS built-in, so it’s a simple download and flash of the firmware. You can get a copy of the firmware at the mqmaker forum.
I haven’t tried it myself, but it looks as if stas2z’s BB version of the firmware also has the SQM-QoS as well at Alternate openwrt at mqmaker.