I mostly do the following, regardless of the gun:
1, shot husks, abombs in the chest when in doubt
2, ignore teleporting banshees unless they charge me in strait line
3, ignore nemesis doing the chicken dance, wait for them to settle, or use stagger
4, ignore phantoms mid flip, wait for them to land on their feet
1. While bodyshooting husks is a completely optimal route, headshotting the suckers is much more satisfying, with abombs - it's better to headshot em though.
2. Crusader is capable to stop and strip the banshee in one clip (with warp ammo and headshots) and kill her with subsequernt 1-1,5 clips (depends on accuracy and penetration). Delay is a pita here.
3. Without staggerpower (destroyer or GTS) it requires a 1337 aiming skill (and is hardly possible with crusader to do it consistently) to HS them while "chicken", bodyshot will stop them and give enough time to headshot, still hardly possible with crusader at 60+fps. Delay is a pita.
4. ignoring phantoms midflip is an optimal tactics, but crusader fails to headshot em right after flip due to the delay, It's a pita because it's completely possible to 2 shot kill her (headshot stips her barriers, the second shot can be a bodyshotm but I prefer my phantoms to be decapitated). Also, you have less chances to save youself with a savior shot when she is about to impale you. Delay is a pita.
Let me summarize briefly:
Is Crusader usefull with that delay? Absolutely yes, it's still a great boss killer and still delivers a lot of gore with mooks.
Is that delay makes it's less fun? Yes, twitch-shooting is fun and is extremely satisfying. There is no reason not to try 'em.
Would it be OP without delay? No, it wouldn't, it would be just more satisfying to use for a number of us, Those who learnt to cope with it's wierdness wouldn't feel the difference in its performance.
If it was OP without delay it would have been the OP setup for QFI and frogfiltrator with their perfect low CD stuggercrutches. It's barely the most OP setup for those two though.
Conclusion (based solely on my opinion): removing the delay would not break the game, but would reedem the great gun, it's a perfect marksman weapon this game really needs. (Sabre and Valk lack boss deeps, Snipers are a different story, Arc Pistol, while great, lacks the feeling of a powerfull gun, Palladin can't deliver such deeps though more effective vs mooks)
I am way over 35 
Are you a grill?