I don't think it matters if Arsenal sign a striker if Arteta is their manager, I can't see him ever winning them the league. If, and it's a sizeable if, Liverpool keep hold of Salah, and far less importantly van Dyke, then they'll still be very good. Not sure they will. Like I said it's just a hunch, but if they go they'd take some replacing.
I've just started watching the match on ITVX with a pint in my hand. I feel more confident about it now and feel like I'll enjoy it. Still wouldn't bet on us to win even knowing the actual outcome, doesn't feel real.
He's got 3 and a half years on his contract, I'd be surprised if he went anywhere this summer (but if he did it would be for bigger money than the £100-£110m than gets quoted). The real question is whether he signs a new contract, if not then you've got to imagine we're only getting one more season out of him.