But Bettman said replay is working exactly as intended and needs no tweaks! So clearly it wasn't a goal. <---- saracasm.  The note somewhere from Bettman's annual  that linesmen may be (or definitely are) letting more plays at the blue line proceed because "they'll get corrected in replay" is alarming. This play is an exception (and I agree, unfortunately the wrong call) - most times the default call is "no conclusive evidence, call on the ice stands." So missed offsides are, in general, not being corrected. 
NHL: get rid of offside video review now.