The only consideration I really have is with said characters literally jumping ship to join the Green Lanterns. Starfleet has historically taken a dim view of their officers abandoning their posts to join [url=https://memory-alpha.fandom.com/wiki/Maquis]paramilitary organizations[/url].

Horus has [url=https://wh40k.lexicanum.com/wiki/Drop_Site_Massacre]other ways[/url] of dealing with those not completely loyal to him.