TBH, at this point there's a decent part of me that'd rather see Jamyl remain in power, albeit significantly weakened and more subordinate to the other heirs.
Reasons are twofold: First, if everyone gets deposed in short order, it'd be kind of... I dunno, bland? "Hey guys, instead of offering a varying evolution of all of the big 4, they're all getting their leaders offed and we're starting with a completely new slate." Just seems kinda =S to me.
Second, the Amarr just had an Emperor get offed. Can the nation that nominally has the longest-reigning leaders not have the single fastest leadership turnover in the game?
On the otherhand, Jamyl herself represents such a colossal headache for many Amarr that it'd be sticky to leave her in place as well. So, I dunno.