All the technical critique seems fair but it seemed like they (both as an individual and as a company) were a first time contributor and no outreach was really done to pull them in further. I guess LineRate imploded within F5 so there could have been structural problems inside there prevented them from doing a fully baked contribution anyway.
The only mailing list thread I see regarding this is here, and it doesn't seem particularly underhanded to me: https://lists.freebsd.org/pipermail/freebsd-hackers/2014-Nov...