No, Chelsea example proves nothing.
Did they create any clear chance, a sitter? No, they didn't. The only chances they had were longshots. We were surprised by Willian and Valverde didn't build his tactics around him, that's a mistake, but they have a huge diversity in attack.
You couldn't even guess the formation.
If we tried to attack more, we'd be more vulnerable to counters and probably lose the game. We did well, all things considered. Nothing guarantees you we'd create more, not to mention score.
I don't expect us to win every match.
Drawing conclusion from that match on that pitch is pointless.
Look, you think if we play with Coutinho, Dembele, Messi, and Suarez we'll create more. No, we won't. Yes, Coutinho might score from distance, Dembele might counter them or pick a good cross/pass, but it'll be extremely tough to create anything.
How many chances did we create vs Juventus last season? With Neymar on the pitch? Or during Pep's era against parked buses?
I think Coutinho should start as he could be useful.