I don't understand how that isn't clear.

Less heat buildup = can fire more shots, and thus kill more people than a logi with the same weapon before overheating.
Faster reload = Get back to killing faster than a logi with the same weapon.
Faster ROF = Fire more shots, do more damage, and kill faster than a logi with the same weapon.
Bigger magazine = Keep shooting and killing when a logi with the same weapon would have to stop and reload.

I do enjoy the laser heat buildup bonus, though I think a large part of that is because I use the semi-auto Scrambler.

As a practical matter though, heat buildup benefits two weapon types in the Amarr Arsenal: the Laser Rifle (due for a fix, has issues), and the Semi-auto Scrambler Rifle. The Assault Scrambler doesn't generate enough heat for it to be an issue on any suit, and Scrambler Pistols don't generate heat.

Other races have more weapons, generally speaking, especially post 1.8:
Caldari: Rail Rifle, Sniper Rifle, Bolt Pistol, Magsec (all Rail-based and would benefit from proposed bonuses - only leaves out Swarm Launcher)
Gallente: Plasma Rifle, Ion Pistol, Shotgun, Plasma Cannon (Hybrid blaster types)
Minmatar: Combat Rifle, Flaylock, Mass Driver, SMG (projectile and explosive)

So, three races get bonuses that are good for all four of their racial weapons.

The Amarr only have three racial weapons, and the bonus is good for 1.5 of them. That seems problematic, especially given the lack of any announced Amarr weaponry outside the "Heavy" option. The Minmatar will add a Precision Rifle to their list at some point as well.

The operation skill of the scrambler and laser rifle to should be a 3% reduction in heat buildup per level;
Amarr Assault skill should be a 5% bonus to laser weaponry cooldown speed and 2% reduction of laser weaponry heat buildup per level.

I think this is the best way to balance laser weapons.

I'm guessing the lack of response from CCP is because this would make them overhaul EVERYTHING they had planned for the new Assault suits. Meaning they'd have to do a shitload of coding all over again.

Balancing weapon stats just means having teams play-test for several hours after tweaking numbers on a database; it doesn't meant that they'll have to do a huge amount of editing code, but it is very time consuming nonetheless.

Assaults need a decent bonus.
They'll otherwise be outclassed by Heavies and Scouts.

How is the assault/logi info still not released!?

No joke. It's not like people haven't asked in various places. I know I mentioned the lack of info there as being detrimental to making contextual comparisons of the proposed scout suits in one of the scout threads to IWS as well.

I thought the Chinese New Year wrapped up last weekend, but maybe it's a more extended holiday than I'm aware of.

That works I guess

Amarr i could see keeping the heat buildup, but 25% is seriously. TOO. *******. HIGH.
When an amarr can spew bullets in CQC and out murder anything, there's a problem.