Looks good to me. Even the adbv slits I've seen on the 820S recently haven't been anything that would affect it's performance, in my judgement. 'Not excusing them though.'
As with all adbv slits/indentions seen, it's because the pressure from the compression spring ends up on central part of the adbv partially resting on part of inlet hole(s). A narrower adbv central portion resting only on solid part of plate would eliminate that. Topic adbv 'appears' somewhat narrower than several 820 posted recently.
Based on anecdotes posted including topic, excepting the 820, I'd not hesitate to use MC oil filters.
Thanks for c&p.