Cause in MK9 you could escape from JC's pressure if you knew when to counter poke. His force ball frame traps could be avoided and he could be punished with a full combo afterwards. His zoning was shit, while NW's zoning is one of the best in the game, his down pokes were punishable, while NW's are +f on block, JC didnt have full screen frame traps, while NW has. Those are some of the differences those two characters have.
It's all in what angle you come at these characters and games.
1) Escaping f+3333333, is not done through counter pokeing. Yes some characters can escape FB pressure with the right poke at the right time, but again, that is if they chose not to just f+33333333 all day long.
2) JC's zoning may be crap, and NW may have full screen frame traps making him one of the better zoners, but NW's mobility is crap in that stance, so depending on the character you can expolit that to your benifit both up close, in the mid game, and from a far. In contrast, JC is highly mobile all the time, with one of the best dashes in the game, one of the best AAs, and once he gets in, he built to say in, keep you on you feet evern from jusggle states, and counter EVERYTHING. While NW can switch stances (which can leave him open if done at the wrong time) and gain more mobility and zoning options on the fly, JC is just a machine with rapid fire CQC frame traps.
Like I said, it is all in how you come at the game. Overall, Injustice just gives all the characters more options than those in MK9 in the close, mid, and far ranges. Not having to rely soley on counterpokeing to releave CQ pressure is not a bad thing, if you don't like it, it's a style preference more than anything else.