There is only 130 Jetstar Pilots who have access to the MOU.
If it goes to vote, even if those guys want to keep it, the rest don't.
If the scope was broadened there may be more support for it. Right now, it's a waste of time for the other 90% of Jetstar guys, hence the lack if support.
It'll be gone this EBA unless it's derailed by the Irishman.