His first touch is very naughty.
Personally would be really interested in seeing Sigurdsson given a break, Bernard in his place, Richarlison on the left and probably DCL up top. Gylfi is playing very well individually but I have a hunch he's not actually that good at making players around him/the attack as a whole function well, which is important as a 10...may be wrong but I'd be curious to see
His three defence-splitting passes the other day suggest otherwise though, even though I don't think he had his best game for us.
Bernard has never really played as a 10 though, at least not on a consistent basis.
Also, at the moment Gylfi doesn't really play as a 10. He plays as a second striker, so we are able to press in a 4-4-2 system and then when we have the ball he drops back to the 10 position.
I can't really see Bernard offering that physicality in that role.
But it's definitely an option to have.