The band’s return to the ACC finds the usual frenetic energy somewhat lacking, owing to less anthem-y new songs and a very chatty Chad Kroeger, though the execution of the set was technically flawless. Nick Krewen Music, Published on Mon Feb 23 2015 Nickelback 2.5 stars At the Air Canada Centre, Feb. 22. Nickelback has changed its performance tactic. Once a combo that used all the bells and whistles available…