It plays perfectly with Roon, I use both every day 
Lack of EQ with MQA content is an MQA issue, not a Meridian drawback. No DAC can preserve MQA and EQ currently.
SQ is reference level. There’s a comparative review here next to some fairly esoteric kit: http://www.hifi-advice.com/blog/review/digital-reviews/spdif-dac-reviews/meridian-818v3-mc200-dsp-5200-se/ about halfway down the page the review focuses on the 818 in a non-Meridian context.