The new automation system is fantastic. The only problem is the "When" conditions don't include anything that allows us to comment on a ticket when no action has happened.

Perhaps allowing a JQL query? so we could use updated < -2w to get any tickets not updated within the last 2 weeks which would add a comment and put it in a pending closure status. Then a second rule would check for tickets in that pending closure status that need closing if no updates within another 2 weeks.