That's true, more clarification would be good.
Talking about the +1, I'm otherwise fully convinced about what said before regarding inside and outside box, no particular doubts about that.
It's definitely not a go to defence, but it's hard to tell whether this is true because is less efficient regardless of players (as some offensive set, such as the isolations) or because of the poor interpretation of this strategy.
Exactly as the 3-2, absolutely not better than a m2m (I'm not talking about ratings) with unbalanced outside defenders or without proper big men