Really feel for Houston. It's like the Gaff situation. It was a bed decision and deserves a suspension but I don't think he's a dirty player and I didn't see any malice.
If he’s touch and go (and being a Sunday game the few extra days could be meaningful) they basically need to name him and let him be a late withdrawal. The AFL doesn’t really support him being a late in if he turns out to be fit to play, so this is the only option.