Well i decided to try anyway because i noticed the changes made to tame beast "spell?", which is it doesn't cost anything, has a shorted duration? around 10 sec and no longer makes hunter vulnerable (i.e no armor).
My hunter is a fresh 80 with just about 17k health? and mostly in quest gear (all blues).
My tactic is simple.. just keep trying.. lol ...
Krush will fear early on ...in fact the first few seconds after you engage him, but he doesn't do alot of damage. I just feign death the moment i got out of fear. Then heal up and run back and try again. He will fear you the first time always, but once the fear stops if you have about 70% life left can try and tame again. That what i did and he didn't fear me at all and i got him. Took about 9 attempts. Lotsa bandages and food

Just putting it here to let people know. Good luck.