2x about Beckenbauer.
When Beckenbauer moves into midfield, it will be during his team's possession, but for Rummenigge/Stoichkov to threaten 2mufc0/Gio's defense you need to have the ball. It's not clear to me what you expect to happen in between.
Here's how I see it: If Beckenbauer pushes into midfield, he'll create numerical superiority there. In my assessment he'll also do so only when he identifies a pocket of space or an imbalance in your structure. So the pressure would be on your team first, and I think you haven't really said how you plan to address that threat.
Your remarks about Kalle/Stoichkov suggest they won't track back in that situation, staying up with the oppo's defenders instead. So until you win the ball, they'd be non-factors in that scenario. A lot will depend on Pele then, will he track Beckenbauer's run? If he's not the guy to do it (can't tell), it would be basically 7 vs 7, even when 2mufc0/Gio's fullbacks stay behind to cover, as you seem to expect. You have some great defensive players in your team, but against that offensive this would still be extremly risky, imo, perhaps suicidal.
So could you explain how you defend that scenario? If you win the ball, the gamble of leaving 2 players up high - or even three, depending on Pele - might well pay out, but you have to win it first.
(In case I have misinterpreted your posts, please clear up my mistake.)
Didn't get what you're arguing here, tbh.
Beckenbauer (as a CB/libero) didn't usually operate in midfield out of possession, except for the occasional sweeping action, or briefly when moving back from a high position during defensive transition. When you have the ball, I'd expect him to act as a central defender first and foremost. If Pele operates in midfield areas, I'd expect 2mufc0/Gio's DM to primarily deal with him.