Sure, sell hem and blame Iniesta when the whole team underperformed.
Yep, as always, taking things out of context. Clearly, the tactical focus this year has been to get the ball up front to the forwards, which, by default, is going to lessen the impact of the midfielders (who, with Pep's Barça, were infrequent finishers, but more creators). If you are really going to evaluate Iniesta, one should ask: 1) is the team scoring less goals with him on the pitch (offensive), 2) is the opposition scoring more goals with him on the pitch (defensive)? Last I checked, Barça was on pace to match their goalscoring from previous years. If one was to examine only the games in which Iniesta has played (and also consider the quality of the opponents/tactics), I'm not sure you would see any significant difference in team scoring or goal differential from previous years. Which would mean the tactical system operating this year is more or less as effective as previously, but the offensive focus has shifted. Even with the limitations on the midfielders from the new tactics, I still see Iniesta create multiple key passes every game he plays (even if he has no assists to show for it).
In previous years, Barça forwards have scored about 70% of the goals. This season to date, they have scored 85%, a significant shift. During Barça's best scoring season, 2012-2013, 115 goals were scored in La Liga, averaging 3.03 per game. This season to date, Barça is averaging 2.79 goals, better than last year, and
*better than any seasons other than the two between 2011-2013 since 2001* (as far back as the records I found went). Barça is on pace to score 106 goals for the season and 22 goals against, a whopping goal difference of 84, only ever bettered by Real Madrid and Barcelona in 2011-2012 (89 and 85 GD, respectively).
So whatever his diminished direct role in the offense, Iniesta has contributed to one of Barça's best offensive/defensive seasons ever. I don't know what people expect: that we'd manita every game and have a 150 goal season? With the number of teams parking the bus, it's quite an achievement.
One might argue that swapping Iniesta for a top quality box-to-box midfielder might improve Lucho's system. But that player isn't on Barça's bench.