Furia, don't forget that in the LWAMI Mod you have the option of the MK54 to which replaces the Mk46 (same text in the loadout screen however, couldn't change that) which will give you 17km@50kts.
Auto TMA for the subs is not playing Dangerous Waters, its playing Crimson Waters.
I won't play a game with auto TMA for submarines. It essentially takes 2/3 of the tactics used in submarine warfare completely out of the picture. The simulator become a game of mark sonar, wait 5 minutes, set WEPs, and fire. It sucks.
But for learning the simulator and practicing tactics aTMA is very useful and I highly recommend it for beginners where the extra burden of TMA will often break their back. But for MP dives, no no no no no way.
That having been said, aTMA for the FFG is fine by me, the autonomous torpedo decoys known as OHP FFG's need all the help they can get.
