In defined benefit plans like this one, you’re dealing with promises rather than account balances. Still, employer contributions and service years matter. If your spouse’s benefit includes employer contributions based on years of service, the QDRO must determine how those will be divided and whether any unvested amounts are excluded.
Loan balances are generally less relevant in defined benefit plans than in 401(k) plans, but it’s wise to ask the plan administrator if any borrowing against future benefits has occurred—especially in executive pension setups. If loans exist, a QDRO should address how they affect the alternate payee’s benefits.
Roth vs. traditional distinctions usually do not apply here, as defined benefit plans pay a taxable annuity upon retirement. There are no Roth-type tax treatments in plans like this. But if the employer participates in multiple plans—including 401(k)s with Roth components—make sure the QDRO applies only to the defined benefit structure unless otherwise specified.