Haven't seen it yet - but you have made it sound rather crap. Which is a shame, as the book trilogy is pretty good
But then I think the crapness was telegraphed when the 2nd trailer was released.
The 1st trailer made it seem rather mysterious and deeply creepy.
Then the 2nd trailer was all "I love you", "budda budda" "Aiiieeeee!!!" "budda budda budda, bang bang" "No! Noooo!!!!" - Like someone had taken Movie Trailers for Americans rather too literally.
Will get around to watching it at some point, but if they wanted to remake "Stalker" they should have just re-animated Tarkovsky.