Nightbird need some love.
Maybe the guy you saw was a very good pilot and it doesn't mean Nightbird need a nerf.
Nightbird have a lot of issues:
Flairs doesn't work everytime , sometimes it seem ths heli have a glue and fly slowly suddenly, the gravity next to the ground is awfull, stingers can kill the pilot and make no damage to the heli , a stealth pilot can just destroy Nightbird with noskill with auto lock missiles the Nightbird can flip in the ground so frequently , when stealth and attack heli shooting you you can't aim anymore and fell you are inside a shaker, sometimes you just touch a wall and be destroyed., you cannot avoid to be hit sometimes with the third missiles of jets. ....
Nothing against you., but like you said you never fly in Nightbird.