I'm scared by the word "pension" also, but MBCBP is a fully funded account outside of Delta's grasp. The only WDTTDT moment so far has been the delay in crediting funds to the account. I haven't dug into the exact math behind crediting gains to the account, but my guess is somebody is making a few $ off the float from the delayed contributions. At 59.5 *, you can roll funds out of the plan into your own account.

*see fine print in plan for criteria


PSA - Update your plan befeficiaries. They do not automatically carry over from your other Fidelity plans.