Ramsey is mostly poor defensively and is most effective when playing off balls into the box, ie play the ball into Giroud and run onto a layoff or loose ball from a tackle is where most of his goal threat comes from. His general all around play is massively over rated, it's those goals that made people start rating him but with Walcott upfront we've again(like every single time we play Walcott in this role) had no interplay with the striker, no playing between Walcott and offensive midfielders.
Sanchez... gifted a chance, absolute gift, fluffs it entirely.