Don't really have a problem with the second con,I'm fast on learning,and I don't see how lots of NPCs can make the story lose focus.
The idea is that the more characters there are, the less focus that can be given for each of them. What would be better, to have a handful of really strong characters or hundreds of generic one-liners? It's not a deal breaker for me though, the pluses more than make up for it.
Edit; and besides, if he gives it a 9.5, then the cons are just him trying to find something to criticise to balance the review rather than glaring faults.