In the standard database, the problem with the SS-N-27 is that the torpedo it drops, Type 40, has a seeker range of 4500m, like all other torpedos. This means that if you fire four of them in a square pattern, with their circle search area, you have just guaranteed that you will find a submarine within a greater than 9km by 9km area.
I'd say that's a pretty light solution requirement.
Or, if you have a bearing line, you can fire six of them along that bearing and cover a potential range of around 16nm, which is nearly the entire spectrum of detectable ranges for submerged contacts!
This, combined with the huge detection ranges in the standard database, and the lack of underwater missile-launch transients, means that the Akula is a nearly undefeatable opponent.
The solution to this, even if you don't want to reduce the mean detection range, is to add underwater missile launch noise and greatly reduce the seeker range of LWTs and SUBROC torpedos, as is realistic, and as has been done in the LWAMI mod, and it's working wonderfully.
