Maybe the question is who will be the alpha or is it possible to have multiple guys leading? I think you can but it has to be the right combination of personalities. Giles has a bit of KG in him personality wise.
I think Swipa is the perfect compliment to MB3, Giles and Buddy because when it comes down to it, he'll perform like a true point guard and make the correct decision ala John Stockton, Steve Nash, Jason Kidd and Earl Conley. If he's got it going on and has a good shot, he'll take it. Or if they start cheating off him, he'll play aggressively. Otherwise he'll get the ball into the hands of the player that has the best matchup or shot on any given possession.
Guys like Russell Westbrook and James Harden (when they ISO him at the top of the arc) are tremendous scorers, but they don't often make the right play and almost always look to score themselves. IMO, that tactic is hurtful in the postseason and can rub teammates the wrong way thus hurting team chemistry.
I don't think we'll ever have to worry about that with De'Aaron. No matter how much his offensive game develops, I still believe he'll usually look to make the correct play rather than look to score first and pass second. For him, it will be look to make the correct play first. There will be games when he has to be selfish because he's got the hot hand or because the defense is daring him to score. But those games won't be the norm IMO.
Because of the above, I don't believe there will be problems with Swipa, MB3, Giles and Buddy co-existing nor will there be issues between alpha leaders.