I don't agree. Jayawardene was excellent in batting wickets. He scored 374 on a flat wicket vs South Africa that had ntini steyn nel and all who were all pretty fast. And he is also very good vs spin. To call him bang average is a bit much.
Yeah, bang average is a tad harsh tbf. Lets just say he isnt as good as his numbers suggest which are stacked by playing in the subcontinent. He's terrible on pitches which have anything for pacers, let alone quality ones where he'd find it tough even on decent tracks.