I noticed also today, that when you meet up with the masters, and they supposedly teach you a new form, while they are explaining about the new form being taught, they are swinging their lightsabers about in choreographed animations like you mentioned, however, i've never actually noticed this happening when i've got the form activated . There is not exactly any space for these moves to be put in effect in K2 anyway, as they only things you do when you are being fired at, is run towards the enemy, and attack them. Also, I always found myself using things like Flurry, Critical Strike(sp?) and Power Attack anyway, and they have their own animations for them as it is. I was thinking that in some way it would be good to be able to combine a couple of these for some "uber-attack" .
Phew, rambling on a bit there, dont know if that made much sense!