I agree that doing that against a Villa side that like to exploit opposition weaknesses was a mistake but at that time he was still learning about the Albion players. He learned from the mistake because he didn't try it again. I also doubt he knew too much about Aston Villa so it was a learning curve for him.
That 1 occurrence doesn't mean that he was too tactically naive for the Premiership though. Of course the Premiership is different to La Liga but it was his first time coaching in this country. Any coach will have trouble when they first go to a new country. David Moyes will find that out when his honeymoon period with Real Sociedad ends and Louis van Gaal has found that out with Man Utd. Van Gaal is often called a genius but even he had trouble early on. For example, against Leicester City who exploited his 3-5-2 formation with 3 strikers and direct play. He learned from that and tweaked things accordingly.
That 1 occurrence doesn't mean that he was too tactically naive for the Premiership though. Of course the Premiership is different to La Liga but it was his first time coaching in this country. Any coach will have trouble when they first go to a new country. David Moyes will find that out when his honeymoon period with Real Sociedad ends and Louis van Gaal has found that out with Man Utd. Van Gaal is often called a genius but even he had trouble early on. For example, against Leicester City who exploited his 3-5-2 formation with 3 strikers and direct play. He learned from that and tweaked things accordingly.