The U.S. currently lacks an air defense system capable of effectively countering modern aerial threats such as the Mi-28NM, Kh-31, and Kh-38.
At the moment, top-tier gameplay appears to be heavily skewed against the U.S. and NATO. Mi-28NMs can climb to a safe altitude and launch LMUR missiles with very little risk of being engaged. Likewise, Su-30SMs can launch Kh-31 or Kh-38 missiles from stand-off range before returning safely to their airfield.
The current U.S. air defense systems NASAMS, CLAWS, and especially ADATS are not capable of reliably intercepting these threats. In contrast, the Soviet tree has access to two of the most effective surface-to-air systems in the game: the Pantsir-S1, which can reliably intercept incoming guided munitions, and the Pantsir-SM-SV, whose engagement capabilities make it extremely difficult for NATO aircraft to employ weapons such as AGM-65 Mavericks or AGM-88 HARMs effectively.
As a result, there is once again a noticeable imbalance at top tier in both CAS and SPAA capabilities, favoring the Soviet side. Introducing a more capable U.S. air defense system would help address this imbalance and improve overall gameplay.
Recently, NASAMS has practically stopped intercepting anything at all. Its missiles fly off in random directions and often lose their target immediately after launch. The AIM-120C-7 behaves like an outdated missile, immediately going dumb and flying off into nowhere instead of tracking its target.