Yea, that interpretation came from the emphasis of the outside agitator between him and syril during the show. So, to me it made more sense for him to realize how he was used (as the outsider agitator, which he did) and join cassian in the battle. Stick up for himself for the first time outside of his power within the empire then die in the fight or something. Oh, well. Its a small nitpick out of the entirety of a really great show.