My deck seems ok, I haven't got time to test it, but I'm rather confident that I will be able to play it efficiently.
Hisar's deck is lacking 2 Sanctuaries and at least a pendulum, in my opinion. That is for three reasons:
1) It needs constant healing, and entropy rushes a lot.
2) It turns into a decker for Pandebonium.
3) Discord needs to be stopped SOON.
I don't really like Jippy's deck... but oh well.
QT's deck needs one more Elite Graboid. Turn a Wind Tower into Elite Graboid and add a pillar, make it a 31 cards deck.
I'm not sure on Truddy's deck. A single Plague destroys it. Anyway, if you want to field that, up two Pendulums instead of Epinephrine. That deck has too much quanta anyway.