The AIM-9X is awesome. Check out the boresight and agility of these things.
I've modded a couple of sub AAM into the game to see what kindof tatics they could allow and its been interesting playing with them, though the vast majority of the time it backfires and makes things worse
So far there have been only 2 situations where its been worth firing...
1. When you absolutely MUST attack a heavily defended target and ASW are above circling, such as a "launch TLAM attack NOW!" order, but the coastline is being heavily patrolled.
2. When your escaping datum in shallow water, and all of a sudden you receive a "Torpedo in the water!" message meaning you've already been counterdetected. Its better to go deep..., but if you can't because of shallow water then snapshooting has been the next best option before evading.
In the first scenario, before I launch TLAMs (which will 100% garantee you'll be detected) I'll raise an ESM to check for ASW helos. If one is within 10nm then I'll launch a couple of AAMs that direction right before I let loose the TLAMs. If the PK of missiles are good (>95%) and the missiles is agile enough to achieve the right vector quickly (to not overturn the helo) then it will kill the helo before it can drop torps and give me time to clear datum before its replacement shows up.
In the 2nd scenario, which happens more often, if escaping a datum (after loosing a salvo) and a torpedo in water drop is detected (meaning a ASW helo has attacked), then I'll loose a 2-3 AAM on a 80degree spread) to try to kill the helo that dropped the torps as I manuever. The success is encumbant of having the missiles on snapshot and the tubes preflooded in anticipation. They will kill the helo preventing a 2nd drop as you evade the first.
In all other situations its almost always come back to bite me to fire them.