You can download the LEDE (fork of OpenWRT) version17.01 RC2 which was released a few days ago. There is a version specifically for the MIFI.

https://downloads.lede-project.org/releases/17.01.0-rc2/targets/ar71xx/generic/

Less pain, much newer firmware. Looks and feels about the same.

I expect the image builder has all the patches included.

FYI, the final release is probably a week or two away.