if there is impact to the game u see it in DA4, u wont see impact of awry mission in DAI, some u see only in DA4 or maybe even in DLC
in most of my saves i have let them die, if u ask why, then i say, that what a good leader would do, they knew the risks when the singed in & became Bull's men, & u can bet that meany soldiers even in real life have died cause of that, cause of orders not to retreat, the thing is u have no idea what happens cause of ur decision of saving bull's men, it could be ferry bad, like red liryum finding its way to more people & more people die cause u did not had the guts to do hard choice, who is not willing to make the hard choices if not fit to rule, ruling is not for soft people, & world leaders know that well, even they are face to face with them time to time & the ones who know it best are the dead leaders
some call letting them die a bad choice, i will try this with my bad inquisitor, well that line made me laugh a bit, neither of the choices is bad in DAI, but in DA4 saving the men mite have bad consequences like i mentioned before, also u can bet that in that ship there are more people then Bull's men