I sat next to a pmCO FA a couple of months ago or so. She said the reason why the FAs are the only union employees who have yet to sign a unified contract is because the UA and CO FA contracts are so radically different. She went on to say the UA contract has all kinds of work restrictions insisted by the union but they are paid less. The CO contract has much more flexibility of work rules and the FAs are paid more as a result. Lastly, she really didn't understand why the pmUA FAs wouldn't want something resembling the CO contract but apparently they don't. Not my opinion... just relaying what I heard.