I would not be surprised to see Txiki leave when Pep does and just hand over control to a new director who gets his own choice of who they want as a manager.
That said I think the perfect person to have at the helm is Pep till Gundo is ready to take over.
We all rate his football intelligence a bit higher than Kompany anyways..
I believe successful transitions come from a manager to his assistant or a manager to one of his players who understands the system (Shankly - Paisley - Fagan - Daglish).. so the formula is continued rather than given a massive change.