Nah it has nothing to do with knowing better, it's just a question of ideas and opinions. I think Breitner-Seedorf offer Keane a bit more freedom in choosing the time to push forward. If he doesn't, he'll have someone who will do it instead of him and you can definitely trust him to do the defensive role, and if he does pushes forward you'll have either of Breitner/Seedorf who both have tremendous defensive abilities and awareness to cover for him. imo you can't ask for more balance in your midfield, doesn't lake work rate, creativity is fine with the added part from two of Enzo/Savicevic/Rummenigge, defensive awareness is top notch. The complete package.
Maybe if I qualify to the finals I'll change Seedorf and Keane and bring on a more defensive midfielder, maybe go for Sammer or Davids or someone in that defensive calibre, but that will be just a tactical change, I think my current midfield is as balanced as it comes.
Worst case scenario, I end up against a team like anto which has a classic #10 like Baggio there. Well, its definitely not the best thing for my team but I'm sure Keane had his fair share of games where SAF instructed him to be a little more defensive minded and keep a guy out of the game, Keane could definitely do that. It might not take his best qualities into the entire match but it does the business.. It's pretty much like we talked about Scirea as the CB, if he has the right attributes for being a top notch defender, he'll be a top notch defender even if you limit his attacking.