It was buffed because it was ultra-rare.
It is still heavy with moderate ammo capacity. It isn't like it is the end all and be all of weapons without the delay. Not when things like the Talon, Reegar, and Arc Pistol exist. 
I can't agree actually. Without the delay it would have been at least almost as OP as lolArc.
Disclaimer: I've contacted Caratinoid to get his permission on using it for public purposes, but he hasn't been around since march (if his profile doesn't lie), so I gonna do a scrubby thing now.
Ok, I've done several NR solos with fixed Crusader today.
TSent. Overload (damage, NS, damage) is only for pesky bit**es and turret. No need for chain when crusader shoots as a normal hitscun gun.
GTS-weapon platform: 1st try, 2nd try.
The times (24,29,27) are not exciting, yeah, but I am a scrub and wasn't able to do better with freaking lazor for example. And crusader has a better boss deeps than ppr. Crusader though allowed me to feel myself extremely comfortable in that aquarium with phantoms, so comfortable that I hadn't even thought about rocketing objectives. If I had to fight with delay... I am not a marksman even without delay.
And I don't think I can do better with Talon on those guys, and even if I could, Talon, while tight enough, doesn't have a sniper range.