Well, let's say he's clearly not taking Arko's side but he's reserving judgment on whether Ruby Central did a reasonable thing or whether it's "a plague on both your houses".
I think what bumps me is the reserving judgment bit. Why? And until when? Is there an exception that some revelation from Ruby Central or Shopify is going to be released that will clarify all of this? We have actions that have happened and we can form opinions based on those right now.
Given Shopify's strong internal culture of "Strong Opinions, Weakly Held" I feel comfortable holding them accountable to that same standard.