So I'm not sure this is intended at all and I'm sure it will be fixed sometime after I post this buuuuut there is a way to avoid the 2nd and 3rd quest groups for The Coup.
This is for the groups that have a tough time and aren't ready to fight the large groups that The Coup brings after the bosses.
When you reach Luggodahn, you can pull him all the way to the entrance of his zone and kill him there. After he is dead The Coup boss and adds will not spawn and you can continue the rest of the instance without having to worry about them.
They will not spawn on the third boss either if you do this on the second boss. The first group cannot be avoided though.
You're welcome for this useless information :rolleyes2: