Those shots make sense, and would be simpler than creating something from scratch.
As for Poe, I wouldn’t want the scene to heavily imply that he survived since the audience may then fixate on his return to the exclusion of the other characters. The goal with the current dialogue was to establish that the Troopers had written off Poe’s fate too quickly in favor of following Finn, but maybe there’s a better way to hint at Poe’s survival without making it too obvious.