What happens if you save Sloane?

True, but it's not very surprising that he succeeds. One of the first things Ryder learns about her is that she's a hothead. I mentioned this in the Reyes thread, but Reyes' tactics reminded me of Patriarch's speech from ME2; the one where he instructed his audience to first go after an enemy's family, and then wait for the enemy go come at you stupid. Sloane is a powder keg that can go off in any number of ways, and this is easy to exploit but hard to control.

Sloane has more presence, sure, but how is the Collective decentralized? Reyes seems to keep a close eye on all operations, has build mystique and a legend around the Charlatan persona that has his people in awe or at least commands respect, and has his men follow minute instructions. Unless I remember wrong, the Collective guy at Kralla's says that he personally chooses each member that gets approached to join, too. If they spread outside Kadara in serious manner, Reyes will have trouble, but as of the game's time, the Collective seems very tightly controlled by one man.