3. Pulis not at fault for West Brom woes
This was largely a grim 90 minutes for West Brom. Tony Pulis is notorious for having perhaps the loudest voice in English football, his often anguished tone bellowing from the touchline as if he's searching for a lost family dog in the woods. That yell got plenty of work at Anfield, and you could see why he was so frustrated.
Pulis is never going to be an especially popular manager for his style of play, but he does have a reputation for creating solid teams that are difficult to beat. They are generally unspectacular, but you don't hire Pulis for flamboyance. He is a manager from whom you know pretty much exactly what you're going to get.
That is, if his players actually do as they're told. It's possible to pick plenty of holes in his game plans and blame him for some of West Brom's ills (for example, opting for a damage-limitation approach in the second half at Anfield, when there seemed little to lose by having a bit more attacking intent), but this defeat and limp performance was certainly not his fault. It was partly due to Liverpool's attacking excellence, but the Baggies didn't exactly make it very hard for their hosts to excel.
Basic errors, such as Ben Foster's aimless hoof into the air that led to Liverpool's second, Mane being left unmarked for the first and the surprising laxness in their closing down (or lack thereof) meant it was relatively simple for Coutinho, Lallana, et al to ping the ball around when they wanted.
After one utterly pointless, clumsy foul on Mane by Olsson in the first half, Pulis threw his chewing gum away in disgust, thoroughly displeased with life. You couldn't really blame him.