I have modded the game to make things more balanced to my point of view:
All plus weapons scaled as well;
PPC heat is 32, down from 35;
AC2 stability dmg is 10, up from 5;
AC5 dmg is 40, down from 45. InventorySize increased to 3, up from 1 ;
AC5 stability dmg is 15, up from 10;
AC10 stability dmg is 30, up from 20. InventorySize increased to 5, up from 2;
AC10 ammo is 10, up from 8;
All SRM and LRM have a penalty 1 to aim;

InventorySize increased to 3, up from 1;

I have modded the game to make things more balanced to my point of view:
All plus weapons scaled as well;
PPC heat is 32, down from 35;
AC2 stability dmg is 10, up from 5;
AC5 dmg is 40, down from 45. 
AC5 stability dmg is 15, up from 10;
AC5 InventorySize increased to 3, up from 1;
AC10 stability dmg is 30, up from 20;
AC10 ammo is 10, up from 8;
AC10 InventorySize increased to 5, up from 3;
AC20 InventorySize increased to 8, up from 4;
Gauss stability dmg is 35, down from 40;
All SRM and LRM have a penalty 1 to aim;
All pulse lasers ignore 1 evasive pip, and maintain all the stock bonus;
Flamers have 8 ammo, up from 4.

Compatible with modtek.
To install place the Weapon_Balance folder in your BATTLETECH/Mods folder.

It has no .dll, just modifications to .json stock files. Because of that it is compatible with any Battletech patch and update, as long ModTek works.