I think it's totally fair to point out potential issues in the beta, after all, that is what it's for.
Jade is a really fun character who has the potential to play a very powerful space control game, there are just a few issues I think NRS should address. Nothing crazy:
I think the hit box on a few moves like F2 and the second hit of B12 should be adjusted to more accurately reflect where her staff is. I see a lot of people just jumping right through the arc of her attack.
Her damage is low and I don't think her pokes fully compensate for it. As I mentioned earlier in the thread, Scarlet slightly out ranges her (for example, her sweep is just as long as Jade's, but comes out faster and doesn't need a move slot) and doesn't give up combo capability or zoning for it. Scorpion's arsenal of forward advancing sword moves and kicks also rival her poking and generally come out quicker while leading to higher rewards. I don't necessarily think they should change any of her moves range or start up, but I think they should lead to higher damage, either in the form of more combo ability, or simply a buffed shadow kick ender.
I really do believe she'll diminish over time if they don't give her something else. As people optimize their combos and start routinely nailing 25-45% off a touch (with KB help), and Jade is by design limited to around 15-20%, it will be harder and harder to keep up. Her zoning isn't THAT good to make up for it.
And, as I mentioned earlier in the thread, I think they should take another look at her KBs. Other than the universal D2/throw ones and her 124 string, I think the others are extremely luck based. 3 of her potentially game changing moves should not depend on the opponent being asleep -- especially when Kabal, Scorpion, and Baraka all have scoutable, reliable KBs that can be used with precision (and that's just the beta characters, take what we've seen on Kombat Kasts with Sub-Zero, Kang, and others, much more skillbased and reliable KBs)
The B12 string not comboing properly online is a bug that should be fixed. People shouldn't be able to jump out of the gap in F21.
There is a lot to learn and adapt to. No one should be writing off a character based on their performance in the beta. But, some of these issues can be identified and I hope NRS is paying attention to them.