Like I said: I replace your reality with my own !!
There is no need to think in terms of "backup". It's about getting quality depth. In this case we could rest Ødegaard or Xhaka, and the level doesn't drop much, or maybe at all.I've watched some games at the beginning of the season where he was really bad. I've also watched the last couple of games, where Leicester as a whole played much better, with Tielemans higher on the pitch (more as a 10).
I've watched every game for Belgium, as I'm Belgian He'll probably be paired with Witsel in midfield, and my guess is it will be painfull to watch since neither of them is running into spaces.
It's funny you say that because that's Youri by definition: altering performances. I agree with you though he's probably better than Vieira and certainly more ready. I am curious what Arteta could do with this man, but at this point he would not start for Arsenal.
I think we agree. He's a steal at that price point. But he will be backup IF we get him.
That's not the case with Vieira, Elneny or Sambi. ESR is a total question mark regarding staying fit or being able to play CMF at this point.