Semi-arbitrary. Focusing upon immediate action coordination sounds thoughtful and intelligent, which is a measure that others tend to receive well; but in practice it’s a suboptimal course of action which I’d expect others to realise. Ash implied they didn’t think about the dead person at all, which doesn’t really make sense for somebody who immediately focused on night mechanics; but even if they didn’t, Ash didn’t drop the plan at all once it was pointed out. Just “eh, there’s a wrinkle, oh whatever”.
Someone noticed this flaw immediately and pointed it out; if he was evil, Ash would be good so he’d be incentivised to go along with it. Bionic realised the nightkills would ruin the plan of checking everyone and suggested picking the next player in a row instead (so that at least one player checks the killed player and knows their sanity), before reconsidering the issues in this plan; suggesting a malleable mindset. Ash claimed to agree with Bionic about this, and yet just talked about all checking the same person anyway so they didn’t really read Bionic’s messages, I think.