Except that his approach to big matches wasn't 'all over the place' last season. Barca struggling away in the CL is nothing new. He didn't improve there, that's true. Atletico (1-1, 1-0), Real (3-0, 2-2), Juventus (3-0) etc. Losing to Roma doesn't change it. He resorted to a more defensive approach in big matches (which worked well with Paulinho). This season it's going to be different.
The Juventus 3-0 game was the only good game which kinda gave a good idea the foundation we should start building on, especially with the departure of Alves and Messi RW problems. Dembele got injured then he switched tactics, did well again but ever since Dembele got back from injury he lost it entirely there. Lost any kind of attacking clue, losing to Roma was just a result of his lack of ideas and vision that he's been showing week in week out prior to the big matches. People only looking at results dont want to address problems, that is why Roma is there to expose all of them. "Roma is just one match we lost" is a common misconception, because it exactly highlights what kind of problems we have. Scraping some very sketchy wins in La Liga doesnt change the fact that there's serious problems with our tactics.
This season is not going to be much of a difference because I see the same problems during Lucho's late season. And Ev's approach has always been subbing out Semedo when we're struggling, while people like Pique is leaving all kinds of gaps in the defence. Roberto didnt do much to help either.
It honestly boggles my mind how people think this season would be a breakthrough CL season with Valverde. Realistically speaking, we still have many loopholes not addressed yet. Depth wise, we only look good on paper but Valverde is doing the bare minimum to maximise our potential, because he is still stuck with that defensive stagnant mindset, especially with no intentions of utilising counter attacking. No real system to teamplay as well.
There simply isnt gonna be a much of difference this season.