I have a good friend who has been at UPS for around 20 years and we just had this conversation. In the past I had described it as Guard vs Active Duty, but that's not quite right either. It's similar in that the FQS will not have a lot of control over where they do their job or when the company will want them to move. In past there was significant financial incentives to become a FQS; instant CA along with the pay and pension. My friend told me that new FQS are not paid as much as line CAs and they don't have a pension. If anyone was ever borderline about FQS in the past, I don't think there is any reason to become one today. There are too many other jobs out there with more predictability.