As of right now AI AA can easily take down a helicopter, too easily.
Sometime even when you dodge the missile you still blow up, I think Infantry AA missiles should be less accurate because sometimes even when using flares and doing some good dodging maneuvers you still somehow get hit.
Let me know what do you think about the current AA and AA countermeasures.
Flares should actually be completely obsolete by 2035. Modern IR missiles have sensors that can clearly discern a flare from a non-flare heat source, and software packs that will sort out any doubt if there is any in the sensor itself.
We haven't seen these missiles in action yet, because no nation currently in conflict uses them in a large scale and against enemies offering air targets worth throwing these missiles against.
If anything, flares should be LESS effective. So, as far as near future realism and play-balance is concerned, it is okay as it is.