For those who are yet unaware of the new detachments: http://imgur.com/a/4ypvF
Looks like you can now run a full-on Crusade. Both Crusade Detachments seem to be reasonably playable at 1850 points. Wrathful Crusade might be iffy, because no one liked to be led by a Witch (I do accept the Saint though, but I am as bias as one can be when it comes to Living Saints), but the re-roll of charges might be cool.
The Castellan Detachment seems more like it. Forget Zealot. Taking the full selection and have a coherent army will not be possible below 3000pts. However, you can freely mix Imperial Guard and Templars with potentially respawning Troops choices. Go for Drop Pod assault supported by Scion strike teams and flyers or go for the good ol' rush le bum with Crusaders and an Imperial Tank line. So many combinations are possible and open really fun new lists that weren't possible with allies due to the tax involved.
Troops returning on a 5+ seems more of a nice-to-have bonus than a real strategy. However, there is a decent chance, that a Land Raider Crusader or a Crusader blob will return and the odd Veteran Squad or Chimera is bound to pop up again here or there.
So, what do you guys think. I think it is super cool to be able to run a coherent crusade. It might not crush tournaments in a consistent manner, but it might just be the most fun thing ever, so who cares