I think we looked even more defensively unstable with the 3-4-3 Muslin was playing. We conceded a lot of goals during the last campaign (5 to Austria alone) and made many defensive errors. The main reason we were able to overcome that is by freeing Tadic and Kostic of their defensive responsibilities, allowing them to focus entirely on attack. Luckily both happened to be in great form.Zoric, you hit upon a point that worries me the most currently; we don't look great in a 4-2-3-1 in terms of defensive cohesion. This was a problem under Mihajlovic and it seems to be the same thing, at least in the game versus Chile.
I think one of the things that concerns me the most is how slow we are. If we start Tosic and Ljajic, we might the slowest team in the tournament. Not a single guy I would consider quick.