When we were there in Oct, we ate at the breakfast, and loved it! They are right about only 5 characters... that day we saw Mary and Bert in the lobby and Pooh, Tigger and Alice inside.
It is possible once they are able to cast the parts of Lady Tremain, Drizella and Anastasia they will rotate through them as well. I understand that since they will be face characters, they have had a hard time.
Anyway, other meals usually only have only 5 characters each time, as well!
At Storybook Princess we saw Snow White, Mary Poppins, Aurora, Belle and Jasmine that day. At Hollywood and Vine, there were Minnie in the lobby, Goofy, Pluto and Chip and Dale, at LTT, there were Minnie, Goofy, Pluto and Chip and Dale, at Chef Mickey's (this was a long time ago) there was Mickey, Minnie, Donald, Pluto and Goofy, at ARtist's Point, when they had a character breakfast, there were Pooh, Eeyore, and Tigger,and at the Garden Grille there were Mickey, Pluto Chip and Dale.
Don't feel like you are being cheated if you only see 3-5 characters, that is actually pretty standard, and they never go over 5!