Hello,
i have the elite series 2, too.
Stick drift is also there, but only in the first 1mm after Stick activation. And just to the left side. This sucks, really, because i paid a lot money for it.
But honestly, the Controller except Stick drift is so much great technology and makes me so fun to play. E.g. on warzone i can set the deathzone to 0.5 and the Stick drift is available in minimal stick activation. Yes its still available, but it is really
only in minimal activation. Do it disturb my gameplay? Not really, the aim is still pretty nice.
So yes, warranty is necessary, but do not make your own adventure with the controller so bad. The controller still makes a lot of fun to play and the precision it was build with is very nice.
I came from germany and there we say „do not draw the devil on the wall“.