It's never an element that can be considered in isolation. While not wanting to sound like a 'all stats are crap' advocate, it's all over-complicated. Possession is a good thing if you don't want to lose. Possession is a great thing if you want to win and know how to use it to attack and score goals. The irritating thing about the use of possession stats is that on its own it doesn't tell you much at all. Speed of passing from one player to the next while in possession is more revealing, as is movement in different areas of the pitch. Last season and in pre-season this time, the team uses possession much like the great teams of the late 70s and 80s did after getting safely ahead of the opposition: lots of backward passes, at a slowish tempo, with few attempts at killer through balls or crosses. The problem is we play like that when the scores are level. Rodgers' sides only really thrive when players release the ball very, very quickly and the tempo is ultra-high.