First of all, thank you for answering me. :)
Don't you think that the real level of 2-3 is deductable by experienced managers, like other National Team coaches are? I mean, they just watch your players and your level with a 3-2, and they can understand which will be your level with a 2-3. Anyway, if you want to hide that defence, a "man to man" defence works much better than a 3-2 in all situations, and hides at the same time the real level of a 2-3 at the same way. :)