Thanks for the feedback mate, really appreciated when a neutral takes the time to go through the teams in great detail as you.
Just to reiterate some points - Sammer would surely will add to the attacking phase. The reason why I went with him was exactly that - his surges forward and how he decided some of the biggest game at the highest level. Edwards also plays as a B2B midfielder - pretty much in his zone here, so he will also add to the attacking phase. The DM/anchor dropping back is Varela who will fill the void left by Sammer when he goes forward.
Onto Zebec -
https://www.11v11.com/matches/england-v-yugoslavia-28-november-1956-226792/
https://www.11v11.com/matches/yugoslavia-v-greece-09-may-1953-226216/
https://www.11v11.com/matches/greece-v-yugoslavia-28-march-1954-226334/
https://www.11v11.com/matches/yugoslavia-v-israel-08-november-1953-226284/
https://www.11v11.com/matches/yugoslavia-v-france-16-june-1954-226376/
he was predominantly used as a left side midfielder or left winger at the height of his career. He mainly an attacking player and had a goalscoring rate of 1 goal in 3 games both for club and country. If Sammer role is being questioned Zebec's role in a flat back four is much more dubious especially given the setup.
Zebec was far from the defensive level of Schnellinger or Camacho in a flat back 4. If you use him as wingback - then yes I can give you that but certainly not in the current setup.
As for Rivaldo. I'd rate him below Ronaldinho at his peak, but ahead of Neymar and Kaka for example. He's still one of the best attackers and loved the big stage. Generally he tends to be underrated in these things and probably would won't be much of a pull apart from when you combine him with Ronaldinho and Fenomeno.
The reason why I went with Djalma and Marzolini is of course the opposition wingers in mind, but Marzolini is very useful carrying the ball forward, whilst Djalma provides the stage for Sammer to surge forward and the latter addition to the defence and transitioning to midfield is second to none.
He has decided more than one game going forward, so he has to be minded by the opposition midfielders/defenders.
In terms of numbers we have always a spare man to cover for counter attacks and with our midfield being IMO better (especially with Nedved and Sammer overloading it) IDmanager would have his supply to the forward line cut off most of the cases, thus limiting his chances going forward. The balanced to defensive full backs allow us not to be vulnerable on counters as we cover the opposition strengths pretty well.