For the record, I would imagine that Bajorans would have death penalty - whether they had it before the Occupation or not, I imagine that the post-Occupation authorities would establish it, probably for war criminals including collaborators, and it they had already had it, they certainly wouldn't revoke it. But they'll have to revoke it when/if Bajor joins the Federation.
That would certainly add an extra complication--especially if there's any sense the Bajorans rushing the trial to make sure Dukat is executed before any chance of joining the Federation. (An almost Cardassian maneuver--which might not go over too well for Bajor's chances of joining the Federation.)
I could actually see some ties back to "Duet" if a repentant Dukat was no longer trying to save his own life. There'd be all sorts of debate among the people as to whether they're playing into some sort of farce on one side, and whether they should put someone to death who may well actually be sorry for what happened, or on a third side, whether they're just participating in an assisted suicide after Dukat lost his daughter. Now to me, "Duet" DID seem to hint that the Bajorans had the death penalty, since Marritza seemed to think he would be put to death. (Though that could also be because he expects that as a product of being raised in the Cardassian system.)