Bale over did most of what he tried, and somehow as a "striker" he can't do anything but hit the bar. Just really not enough goal threat, the movement in and around the box in tight area's just wasn't there. Bale is fast and powerful but doesn't almost ever do what Arfa did all game which is carve up people in a tight space. Bale can beat anyone to the goal line and pretty easily, but he can't go through 4 people and run into a shooting position, and his crossing is vastly over rated, its usually way ahead of everyone, or way over hit. Ultimately he gets to the corner flag easily because this is where defenders WANT you to go rather than into the box, he seems to think its utmost brilliance beating everyone into the corner, then doing nothing with it. Almost all defences are designed to push people away from the box, its not rocket science.
Arfa created space and time for his team all game long, though the front three weren't clicking great today, Tiote took a bit of a knock and that seemed to cause them to push Cabaye behind him to risk less big tackles and protect Tiote a little so there creative passer to feed those three was too deep but the quality those three have one chance and its over.
That's Newcastles biggest tool, the fact that they were actually dominated in quite a few games that they still won because 1-2 chances is all they are taking while other teams will create 15 chances and not score. Ba/Cisse are ridiculously clinical, stats wise goals to shots Cisse absolute blew everyone away last year, by a freaking ridiculous amount.
Bale isn't creative enough, he's just pure power/speed, Sandro isn't much of anything, Lennon is far to light weight in all area's(think Arfa I dunno, 5-10 times making runs around players, Lennon did it once IIRC). Without Modric they really HAVE to play VDV, but he's pretty inconsistent and also not enough, they need a Modric replacement coupled with VDV asap.