I'll start with Range.
In MWO we have a very strange weapon range value. While the listed ranges of our weapons, such as the Medium laser and Gauss Rifle are canonically correct, their actual range is often double the listed range.
This link |> http://www.sarna.net/wiki/Jinggau <| describes a 65 Ton Heavy 'Mech. It caught my attention specifically due to the mention of the Gauss Rifle.
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The listed in-game range is indeed 660 meters. Yet in actuality, you can strike a target for reasonable damage up to 1200 and beyond.
The Medium Laser does this also, with a listed range of 270 Meters, yet is capable of dealing damage out to 500 Meters.
Thats Large Laser territory, a weapon that weighs 4 tons more, takes up more crit slots, and generates more heat!
The ER PPC, Autocannons (2, 5) and ER Large Laser all have ranges that exceed that of the Long Range Missile system, a weapon that reaches 1000 meters and stops dead. SRMs also explode almost as soon as they reach their listed Ranges.
As an example, lets compare two 'Boat' 'Mechs. The Catapult A-1 "Splatcat" and the Hunchback with 9 Medium Lasers.
Both of these weapon systems have a range of 270 Meters. Yet the Splatcat cannot exceed 300 Meters or his weapons do nothing, but the Hunchback can strike targets out to 500 Meters. This is almost double the range of the SRMs, yet canonically have the same Range.
TL;DR for range.
Weapons should not be exceeding their Canon Ranges so much.
Secondly, Convergence.
Convergence is, in my honest opinion, wrong. It should not happen, except in specific circumstances.
Convergence lets all weapons on your 'Mech, regardless of location, strike a single point under the reticle.
Now, this is wrong for a few reasons. The first is Range. my Jaegermech with twin Gauss Rifles can strike the CT of a Spider at point blank range, and also at a distance twice its specified range.
This is because the game is converging both guns on a single point, always. That 'Mech doesn't have any lower arm actuators, it can only adjust its aim up and down, so how are those cannons being tweaked horizontally to achieve such perfect convergence?
The exact same thing happens in my Catapult K2. The problem here is that those ballistic slots are located in my Side Torso sections, how can they possible adjust themselves horizontally to achieve any kind of convergence beyond how they were set when they were installed?
In the Battlemaster, i have 3 Medium Lasers in my Left and RIght torso's respectively. Those hardpoints are built directly in the chassis, and should not be able to adjust where they converge at, but i can run into a Centurion, and point blank alpha all 6 of those Torso Mounted Lasers into the CT of that poor Centurion exactly where my Reticle happens to be.
In actuality, those lasers should converge at a point 270 Meters in front of the 'Mech, and not change, meaning that in that point black situation the Centurion would of suffered damage to the Left and Right torso's to the tune of 15 each. Instead, it took 30 to the chest.
Conclusion:
Ranges must be set to their canon ranges and only exceed that by perhaps 10%, Energy weapons especially. Ballistics should see massive bullet drop as soon as the projectile reaches its range (Example: A Gauss slug would hit on target at 660, but be hitting the deck at 750). PPCs should simply dissipate upon reaching 540/810.
Convergence must be set to the weapons listed max range so that beyond that range, multiples of that weapon would cross and throw off your accuracy significantly (Much like PPCs would in the K2 during Closed Beta when convergence wasn't instant).
The sole exception would be 'Mechs with lower arm actuators. With a target lock in close range, arm mounted weapons should able to converge inside a set distance from the target.
Mildly off-topic but i'd still like to see what people think about it, is the question of visual range. Currently i can see 'Mechs walking off the base, from the opposite side of the map, i feel visual range should be reduced significantly in order to encourage Lights to Scout the enemy. Perhaps also a reduction in Sensor ranges by default?