Cyberpunk as a Gaming Genre is not Cyberpunk as a Literary Genre. The two overlap somewhat, but just as D&D and Sword & Sorcery literature only somewhat overlap, so also CP2020 and the Cyberpunk genre only somewhat overlap.
The tone advice in LUYPS is there to illustrate the differences for fans of the literary genre, as much as or more than being there to educate the new-to-the-genre.
Also note that D&D style Grinding is not normative to the CP2020 game - it's deadly, since damages are usually higher than armor values.
That said, there is no mechanical balance written in.
But since you want a system for balance...
You can obtain four key metrics, tho', from the stats:
- Average Damage per Hit (details below)
- Average Worn Armor (AV+BTM)
- Average Attack base (Ref+Weapon+WpnAcc)
- Average Defense base (Ref+Dodge)
Assuming even skills, a character hits 45% of the time (defender wins ties - see table for proof, below). Each point of difference in the attacker's favor is a 10% improvement; each in the defender's is a 10% reduction.
Average damage is found easiest by taking the minimum rolled damage (all dice rolled 1), adding the maximum damage (all rolling max) and dividing by two... or just accept that a d6 is average 3.5, and a d10 is 5.5, and total it up.
The damage you do per round is going to average equal to your rate of hits times the average damage minus their AV... with the caveat that the actual average will be higher if the AV exceeds average damage but doesn't exceeed maximum damage, as the formula says "NO!"...
So, find the average damage per hit, and take the percentage of it that would be hits...
Example: Mook M has Ref 5, Weapon Skill 2, dodge skill 2, and a weapon doing 3d6, and 4 AV.
PC A has Ref 7, Skill 4 each weapon and athletics, and a weapon doing 3d6 damage, and 8 AV.
A has an 11 total for attacks, vs a 7 defense, and thus has 45+(4x10) percent chance of hit - 85%. He averages 10.5 damage per hit, less the target's AV4, for 6.5 damage per hit, and .85 x 6.5 = 5.525 damage per round. That's gonna hurt under CP2013; under 2020, it adds up pretty quick
The mook, by comparison, hits about 5% of the time, with an average ddamage of 3.5 per hit, for .175 damage per round on average.
Still, said mook is a threat. The PC should be able to handle 3-4 of them no problem... but sooner or later, one will get lucky and put the hurt in.
A final warning about balance
There's this neat thing called Synergy... when two things together perform more than the sum of those two together. Characters in combat tend to be somewhat synergistic, especially if the GM runs NPC's as a cohesive whole and is a creative tactician.
1 2 3 4 5 6 7 8 9 10
D 1 D A A A A A A A A A
e 2 D D A A A A A A A A
f 3 D D D A A A A A A A
e 4 D D D D A A A A A A
n 5 D D D D D A A A A A
d 6 D D D D D D A A A A
e 7 D D D D D D D A A A
r 8 D D D D D D D D A A
9 D D D D D D D D D A
R 10 D D D D D D D D D D