Zexion paid no attention to Demyx's music, though he did have talent. Unfortunately, his talent lied in playing music and not in fighting, or anything actually useful to the Organization. He turned to Axel, again, and this time remained quiet. Saïx was doing things his way, and he had more than likely already overstepped his authority once in his own excitement, and would be much better off not doing it again.

If Seven wanted to do things his way, then Zexion would not interject unless it was absolutely necessary.