I'm about 80% sure just from what I remember that Miracle Jeanne DOES switch to the next item. I found that out the hard way. I had 3 kitty rockets still, so I used to Miracle Jeanne to get GIANT kitty rockets, but ended up just wasting an excaliborg charge on a full screen whiff... I'm pretty sure you get the normal number of charges the regular item had, but I'll confirm this. I'll also try it with mystique momo, but that seems like a waste with anything except the bombs or kitties...
Mystique momo is... weird... I seem to remember doing this a couple times by accident doing the wrong input for the command grab. IIRC, I threw a frying pan or bat almost straight up. I also don't remember it ever coming down. My guess is that it COULD be used as some sort of last-ditch anti-air? Or maybe in some certain combos or something? But other than that, the only usage I could imagine is getting rid of your current item :P
I didn't even know Falling melody existed... I'll get on that one...
I gotta say, though, her astral is pretty epic. It also basically hits in a straight line the entire way across the screen (lazers, pew pew). plus 236236 input is E-Z modo
Her 5D item setting at the beginning of a match or when one runs out is really fast. I can't imagine being punished for it unless you basically did it in your opponents face at neutral. Even miracle Jeanne was really fast. 3C>Miracle Jeanne was pretty nice, even gave you enough time to try running up and pressuring the wakeup.
Reversal super was nice. A lot of times it looked like not all the hits were going to connect, but they still did. I was pleasantly surprised.
I need to confirm if comboing off of 6B is possible with frying pan or bat. I think I managed to do that once, but I don't know if it was the computer being stupid and getting counter 6B'd, or just a regular one. I'll check that.
Whiffing jD with the hammer WILL get you punished. Even having it blocked seemed really easily punishable. I think even Noel 5D could counter after blocking the whole attack.
j.D Kitty is just plain fun. An aerial attack with Litchi 6B range that hits overhead. It's not THAT damaging, and comboing afterward is completely impossible, but there's something really rewarding about smacking your opponent with a giant kitty head.
2C sucks. That's my initial opinion. Even as an anti-air, it's slow as hell, you have to use it really early.
j.2C's hit stun is ridiculously non-existant, IIRC
5D one button, invulnerability on-demand reversal bat is amazing. IF the opponent puts you in the corner and you have the bat, you are getting out of the corner. It sends them flying on hit. I don't know how punishable it is yet, noone's blocked it that I've played...
There's probably a million more things I'd like to point out, but it's 1 AM here and I have homework and class tomorrow...
Post more requests and such, I'll check this before I go arcading and try to get to as many of them as I can (provided someone else doesn't beat me to it...)
EDIT BECAUSE OTHER PEOPLE POSTED
I don't know if I made it clear, but spinny super DOES seem to have invincibility. I'll make sure of it though. Also, I don't know if comboing after is possible... It seems to either throw your opponent away or push you back at the end...
And videos are a no-no. The arcade I go to never allows recording of any kind on any game... I mean, if I get a friend to go with me, I'll make him/her at least try, but I don't want to get kicked out...