How much better than Nasri is KDB? Nasri clearly has more passing/finishing ability than Navas, and Sterling currently, yet we don't play him because he slows us down and makes us narrow compared to what Navas does.
I've seen the KDB videos and obviously he looks class, and you don't post the stats he posted last season without playing at a very high level - but where would he play for us? Silva is amazing in behind the striker so I wouldn't want him pushed back out wide, therefore I assume his aim is to replace Navas, but is KDB the kind of player that would do what Navas does or would he play more into Nasri's style?
We look good playing with 2 genuine wide players and spreading the play, my only worry with this signing would be the loss of that on one side.
These are genuine questions to people who've had chance to watch KDB more than me, as I've only really seen from highlight videos, which of course make anyone look pretty good.