'Voyager' actors Ethan Phillips, Tim Russ, Garrett Wang, Robert Duncan McNeill, guest star Tom Wright, and writer Lisa Klink talked "Tuvix" at Trek Talks 3.
I believe the only reason nothing happened to him was because of Bajor, with him being seen as an Emissary to the Bajoran people, punishing Sisko would Punishing the Prophets chosen one, they wanted Bajor in the federation no matter what, that was the end goal, so leaving Sisko essentially unpunished was right for the greater goal of bringing in Bajor.
I believe the only reason nothing happened to him was because of Bajor, with him being seen as an Emissary to the Bajoran people, punishing Sisko would Punishing the Prophets chosen one, they wanted Bajor in the federation no matter what, that was the end goal, so leaving Sisko essentially unpunished was right for the greater goal of bringing in Bajor.