The fall of house Talt had the curious effect of being both better and worse than I expected. On one hand, they forced his hand into killing them all by all of them turning into supersaiyan; by that point he couldn't leave anyone alive. On the other hand, the whole torture thing was absolutely horrible.
Back to the first hand, at least that ensured no more rebellions would rise. Back to the second hand, he had House Senzu, who where allies of Bricca Talt in helping put down the last rebellion watch.
Back to the first, the guy had just had his father murdered by betrayal by someone they trusted. Back to the second, if he took at least an hour for one of them and there were 57 rebels, the sheer time he took to do this shows how monstrous his fury is and considering how expensive senzu's are he spent a fortune just prolonging their suffering.
I do have two questions though. First one, since two full power super saiyan defeated the rebellion, does that mean Apra helped capture them? Because if Vegeta were already 8 by that point, I would ask why didn't the Goku Lords fight.
The second is, how did the house of Talt keep their preparations hidden? We have seen that houses have individual ki supressing wards but to the point and space to train 57 super saiyans?