yes we no longer have army wide Decent of Angels, Dante and certain warlords may or may not change this (I think its far more likely that just their squad wont scatter)
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Well the rumour is that the razors are a fast slot (so yes compete with the very unit you'd put in them.)
Also, by limiting them to FA or HS (whichever it ends up being) you practically remove the abillity for anyone to use more than 3, when many people likely own 4-6 this is unacceptable