Yes, the way the Sim tracks order priority for platforms has been significantly improved.
For A/C's and helos this means they will utilize their weapons much more effectively and be much more aggressive. In terms of dipping, the stock helos retain their active sonars, but they are not utilized at all by the doctrines.
So, stock helos won't dip intentionally, although if a helo flys low enough, it may drag its dipping sonar, although I don't see why it would be active.
Cheers,
David
PS And yes depth charges work very nice.