Singing and dancing:
Extra service numbers at the end, it is Anza's graduation musical after all.

Important Actors:
Same as FFS

Bad:
Seems kind of rushed, guess they need to fill in those ad libs.  A lot of people are crying as they perform this musical.

Good:
Senshuuraku adlibs.  Anza does her farewell speech.  After the musical there are extra service numbers.  This musical is really emotional which shows in the actors as they cry during emotional parts.  Anza and Morino have a bonus farewell poem at the end that they read.

Bonus:
Adlib and bonus at end