Yup.
I finally managed to get Byleth into Falcon Knight at level 37. It took me a month and 3 Master Seals to achieve it as I kept failing the 70% on the exam. It's not all that much different (not like advanced classing in the other games), but the Lancefaire and extra avoid is nice.
That gives me 3 people who are in Master classes, 3 who I never intend to promote (Bernadette, Petra, and Linhardt), 2 who are in unique classes, and 2 who are slackers. Oh, and my adjutants, who I didn't put a lot of effort into.
The rallying cry of my army remains "GODDAMNIT, Ferdinand!"