When have we been a team that only gives away one shot on goal a game? That was about 4 years ago under Rafa when we were argubly the best team in Europe...
Reina's concentration is very poor at the moment, goals conceded against Hearts, the first against Man City and the second against Arsenal confirm this for me.
Rafa built his strategy from a compact defence, we won't lose if we don't concede philosophy so we had good defensive stats, BR plays the high possession up the field game, this is why we are exposed and look shaky at the back. This doesn't make Reina's life easier but he has been looking panicky for the last couple of years and making mistakes, he was much better when he came to LFC. Not sure we have anybody better right now though, haven't seen too much of them, so cannot say. The manager should know as he sees their play daily.