Tim Sullivan’s review published on Letterboxd:
This one just dives headfirst into gratuitous ultraviolence and I can appreciate that, though I don’t think it’s as strong as the first two seasons. I also wish they hadn’t changed things towards the end. Maybe we’ll get a “Brotherhood” version some day where they adapt this arc closer to the manga and continue with the later arcs. Though that might be wishful thinking. Still, this OVA is fun for what it is.