I Checked Kuni's move list and frame data, she sucks
I've been playing the character since the she is available, and i can tell you she may not be the best or whatsoever, but she is good.
Kuni is character designed to create mental threats, she is definitely a high risk high reward char, just like Skarlet in MK9, most of her damage comes from counters, bait ups and range whiff punish, overall is a char that can test patience of ppl, by going to the poking game to mistakes, lets not forget that she has a good damage output by herself, and she is a great filler for combos. So to play kuni, you have to make ppl respect Kuni's options, if they know what she is capable of, the game becomes interesting.
Kunimitsu can perform oki setups out of knockdowns, she has vortexes that can continuely going as long as she makes you guess wrong, of course
You also listed the most useless moves that you can't cleary use most of the time, or you won't even use it like her reversal, her standing 3, and her DB3, B1.
The SET (F3) Stance can be canceled at any point of raw startup, which alone as ppl are well aware of the downsides of commitment from it, definitely start to do shits once they see her flicking, and she can cancel the SETsunagakure into URAkin, Crouch, DOTon, or any other move of her command list that comes out on standing, Ws sidestepping.
Df3,2 is a tool ONLY to counter, that move can't be used randomly, unless of course someone doesn't know the machthup, but the main purpose of that string is to counter to get a full combo, once the 1st hits connects on counter the other is guaranteed too.
F3+4 is her anti-Sidestep move that grants her a full combo on counter, tho the move hits high, you won't be sidesteping frequently, as it seems this is everyone's way in.
her Crouch is also a threat, tho she can use low or Overhead from it, cancel into URA, SET, or simply back dash, or use other attacks from Ws or Standing.
DF4 is not a close range tool... but is still a poking tool, the range is huge and most ppl can get close on time.
I dunno who you've been playing man, but i do feel good playing her after i overcome most of her dificulties, sure i got bodied a lot in the past, i still do sometimes, but not like they way you sounded to be, well, but my Tag with jin and Kuni solve most of my problems, so i'm good.
Most ppl over the internet can't even use her properly from what i saw a few times back, i though that from the time being a good amount of ppl would play her by now, it seems i'm wrong.
Anyway is good to discuss this with other ppl, i just hope sometime in the future i could improove even more since my stick is about to arrive and i hope to record some matches with her (offline)
Peace brother.
