I have read that Lyman has lists of things that he wants to work on for each title and it's really just a matter of which game needs the most attention. Obviously he has things he wants to do for ACDC but I doubt it's a priority over Walking Dead at the moment.
An update for this game is definitely a "nice to have" versus a "need to have".
I do think we should invest in some sort of device that we could use to clone Lyman though.