I want to preface this post w/ I'm very happy here at K4, I'm only leaving if FedEx or UPS calls and maybe a legacy. You wanted the negatives and here they are IMHO:
-Retirement leaves a lot to be desired. Hopefully it's a priority for the next contract because to attract and retain young talent it needs to change.
-Work rules are weak, not awful, but could use some better language in certain areas w/ QoL improvements on the next contract.
-It's ACMI, they're upgrading like crazy now but tomorrow they can be furloughing if we lose a contract or oil skyrockets. That's any job in aviation, but ACMI is especially vulnerable.
-If you're on the 74 side, fighting w/ Travel & Scheduling over CBA complaint Travel/Pairings can be annoying.
-Training leaves a lot to be desired...
Again these are strictly the negatives, and the positives really outweigh these issues. It's a great job and I'm happy to be here.