"It wouldn't surprise me if there were. Why? Do you have some ideas?" Ellana knows the advisers all work hard, but because of that, some things slip past their notice, like the letter the elves sent to them concerning Galadriel. Cassandra intercepted it and answered it herself, without showing the other advisers. There are probably people here who have ideas on how to fight this war, but who are either too afraid to approach the advisers, or think they wouldn't listen anyway. A rifter probably doubly so.