I got a simple solution for the PPC warrior, alpha warrior, and general AC spam warrior
here.
All it does is change MWO's heat capacity system -- which isn't even much of a change other than values -- in favor of a MW3, TT-ish one that would turn alpha strikes into high risk maneuvers and make heat matter a lot more. Basically at the face value of 30 capacity and MWO's current medium lasers, 7 ML without a penalty would bring you to 28 out of 30 heat. Alpha striking isn't viable anymore!
4 ML brings you to 53.33% capacity, no matter how many heatsinks you have.
There's a dozen side effects from this.
Faster paced action yet slower paced combat (more big stompy robot feel, don't die nearly as fast, PGI might even half armor afterward), longer lasting brawls, time to do the torso twist to spread damage, having to wait to cool off more frequently (but it's faster, too!), trial mechs become seriously viable again, more time to coordinate with team mates, better survival rate from a 'mistake' that would have instantly killed you otherwise.
Best of all it'd take 10 to 30 seconds for PGI to make it happen, and require absolutely no code work.
Then, there's a slight modification further along called "Option 2." It's designed to help balance specific mechs to have some become more favorable for certain builds.