We are getting closer to that day 
See this series on patchwork adding support for the 2+3+3 and other variants, as well as this pull request adding the necessary firmware files.
And yes, those files have already been published also on mtk-openwrt-feeds a while ago for builds with the open source mt76 driver, but they are different from those used in the SinoVoip/BananaPi stock firmware which uses the proprietary driver.