The new power system standardizes EVERYTHING; the benefit of shielding drops off dramatically so you can't really specialize in anything, you can't power a lot of thrust anymore because your power supply is standardized (or its supposed to, hello needles) so you'll always have the same speed, and you can no longer make sacrifices to your ships attributes, like cutting shields in half, to add on another effect. The new system could never allow for a ship that was defined through its chamber effects, because thats just a small piece of it, all ships, without chambers, are basically equal and what its done is strip away your ability to create a ship with weaknesses or specialties; an EWAR ship will be able to fit just as many guns and have just as much basic shielding as a pure combat ship, and that's fucking stupid.
No matter what chamber effect you want its completely static, you can never go beyond the standard. You could never create a ship thats specialized entirely for scanning/radar purposes because its only able to dedicate a tiny fraction of its mass to those systems.
The problem was never that you could fit all those effects, it was that there was no penalty in doing so, because it was tied to a % of mass, so splitting up your ship gave you the same benefit with a fraction of the cost. If effects simply gave a linear benefit, like -1 to all damage taken by armor per effect module it wouldn't be possible to exploit it. Obviously this doesn't work for everything, but thats entirely a problem to do with the poor models for stealth, detection and penetration. The only difference between chamber effects and the old passives is what shape they're forced into, and how many you are allowed to have.
I think you're mixing the removal of exploits in with 2.0; you could've eliminated power generation and passives on docked entities in 1.0 as well, i don't see why anyone thinks there is potential in 2.0; its a worse, more restrictive, FAR MORE EXPLOITABLE version of 1.0 and the only possitive thing i've heard about it has to do with interior decorating. Not that 1.0 is perfect or even that good, but 2.0 is worse in every way when it comes to shipbuilding.
I really couldn't care less for 2.0 so i haven't tried this, but isn't power consumption reduced to 10% once a weapon is fully charged? You should be able to build an alpha ship with 10x more weapon systems as long as your ship doesn't move around while charging them. Maybe im missing something since noone has complained about it yet, it just seems super obviously spaget and im sure once people start crying about it schema will unzip his divine pants and piss all over it like usual.