I can think of a few reasons for the current stats.Edited By: Alex Tylger on Year 10 Day 241 10:05
First of all, when it comes to the current cargo capacity stats of many ships, I would say that canon is mostly irrelevant as the weight system of entities in SWC may not match canon or RL. The ships of the game have just been adjusted to be able to hold a reasonable amount of SWC cargo, allowing various ships to fill various roles. The YT-2000 is one of the fastest ships in the game, hence is balanced with a lower carrier capacity, while a YT-1210 is slower, but has nicer capacity.
When it comes to the hull and weaponry of the Lucrehulk, I can agree with you that compared to certain other ships, they are both "low", but it is still far superior to most. I wouldn't mind seeing the hull increased somewhat or doubled, but that won't happen until a "preparing for combat stat revision". Part of the issue of the Lucre, compared to say.. the Home One, or the Pulsar, is that it is a ship that can be regularly produced by the Trade Federation and not unique like the aforementioned two ships. Hence there is a certain balance in not making the Lucre overly powerful. As for the weapons, I believe they're based on the idea the original stats given for the Lucre around the time of The Phantom Menace where it had 42 quad turbolaser batteries, a significantly weaker type of turbolaser which has merely been converted to laser turrents times four in SWC. Since the time of TPM, the idea of variations in the Lucrehulk designs and purpose have arisen, with wookieepedia now listing 7-8 different Lucre. It's fair to assume that our Lucre is one with pre-Clone Wars stats. Anyways, 42*4 = 168, fairly close to the current 164. Though the 164 may also stem from the Clone Wars refitting of Lucres, giving them 164 quad laser batteries. I figure what type of guns the Lucre sports will also be reviewed at a later point, being given a stronger capital-type laser turret rather than the standard laser turret.
It might also be pointed out that the Lucrehulk, if it is pre-Clone Wars in design, is a ship 30 years old if you consider that we are in year 10 and the Clone Wars were some 18-22 years before the game started. Hence it is not that strange that it can't kick the ass of all modern ships.
In the cases of a lot of capital ships, the passenger capacity seems to be one tenth of canon. Which means the Lucre ought to have 10,000 rather than 1,000. The Home One and SSD sport needlessly high capacities. I say needless because under the current NPC and PC system, even with droids, it is unlikely you'd ever need more than 1,000. Basically you could carry a fourth of the Combine's active members in a Lucre. I figure that's also a thing for review in the future if the TF is given the ability to use droid armies and can use Lucres as droid control ships.
Another reason why it may be low is because the Lucrehulk can actually land and it sports one of the highest cargo capacities in the game, making it easy to build vast amounts of facilities in one landing. The admins may have figured that limiting the passenger capacity would limit owners from being able to build two cities in one go with 10 NPCs building each facility.