If Revan did destroy his own ship, he just cost himself a vessel. This is inconsequential to Traya as that is the plan. Her assassins would cause confusion. Revan attacking his own ship would cost him more than it would Traya.
And as to leadership. The Sith who joined Traya recognized her as Revan's master and joined her without question. They were fiercely loyal and would not betray her unless they got some one on one time with Revan.
If Revan gets his generals, then Traya gets her greatest students. Just sayin.
Good point about the generals. But I just saw that Beni answered this question in his post. /facepalm