As covered before, Regeneration and Resistance act differently.
Resistance increase the effective HP of a ship
Regeneration increases the effective HPS of a ship
They are two totally different concepts.
I put a post out this morning regarding this topic. the idea is to give factions faction specific passives / mod slots, that only can be used on a ship of that faction.
I want to use this as a means to discuss it here in regards to it.
(Passive MOD) Suggested Jericho Technologies (Faction specific) are
Tech: Regenerative shielding: Regenerates 25% shielding, but reduces max HP by 2.5%
Raid: Adaptive shielding: increases all resistance by 25, but reduces regeneration by 4%.
This will give 100% Regeneration on a fighter.
Now lets pair that with the Jericho Shield Mod Slot + Capacitor Slot
95 % Regeneration, 5% HP Reduction
115% Regeneration, 5% Hp Reduction
total reduction = 10% (passive) 17% Mod = 27%
We will use a jericho fighter for this example
90/s regeneration on shields
247.5 Regeneration / s + 140 (synergy cap) = 387.5 Regeneration a second
Hp drops from 8500 to 6800 shields (rounded)
Effective Regeneration from 0 to 100% Hp = 17.5 Seconds
(non-regenerative shielding) 0 to 100% (8500 hp) = 94 seconds.
rapid plasma average hit 150
assault plasma average hit 400
heavy plasma average hit 1200
hail plasma average hit 1000
Average hit 687 damage per shot
687 damage - 387.5 = 299.5 Dps
(rounded) 300 dps / 6800 = 22 second kill time
Min damage (150 rapid plasma) Unkillable
Max damage (1200 heavy plasma) 5 seconds killed
This will put heavy plasma at what it was designed (by me) to do, be effective against lighter craft, but weak towards heavy.
This sort of technology would excel again rapid fire weapons, but be extremely weak against heavy / sniper weapons.
The purpose for this design is to diversify the races.
Now bare in mind all of the top is math for a completely different concept, but this math was to show you, It is not broken.
the races i gave in this post above was almost equal to that of the current booster.
you vastly underestimate the value of even 50 or 100 resistance (which regenerative shielding will lose for that regen)
in the end, when it comes to making the races unique, and the jericho fun and excellent at battle, regenerative shielding is the way to go.