I don't think Picard had any right to 'chew out' Sisko for being pissed. I mean, Locutus was responsible for Jennifer's death. I think it would be hard for anyone to completely separate Picard from his actions as Locutus when they were such an up-close-and-pesonal victim of those actions. If Picard didn't know and appreciate that, then he has no conscience at all.
Yes... I think the conversation was intended to pass the baton and perhaps put a bit a distance between the two shows - give DS9 it's own identity. But asking Sisko to just forgive and forget without even a comment or attitude would have been pretty unrealistic, so I think they played it just right. For Sisko to just forgive and forget without struggle would be like a murder victim's husband in our own day, just forgiving and forgetting a criminal who had murdered his wife just because that criminal was found insane.
It's hard to do something like that - at least right away. Getting to forgiveness can take a long time.