The problem with the 1.6 was, that the common laser weapons had a range 30 and the super guns a 40 - so the common guns had no actual use, and the initial AI attack was without any possible match. Why should the AI use these common guns anyway, while I WANT IT to use the brutal stuff first and only. So, I designed the common guns as cheap high range option for the Human Player, a niche the AI wont use - but could rescue the Human Player. Cheaper, higher range, the Star Missile! Plus, you wont lose it versus CI DisRaptor, while the usage of Invader modul is smooth and great - but high cost, low range, high risk.
I still think that Star Missiles and Barrage Guns need to be better weapons than invasion modules. For a number of reasons:
* The AI is still building those weapons, even though you made them suboptimal.
* The range (30 vs 40) doesn't make much of a difference, because neither is enough to outrange a planet and in a ship-vs-ship battle you can't stay in perfect range for longer than 1 round
* A human player is forced to build lots of invasion modules in any case, unless you play as Minions. Yes you risk DisRaptor attacks, but you can't avoid it anyway, because you often lose several invasion modules when taking a single planet (sometimes more than 10). And since you are forced to build so many invasion modules, building weapons that perform worse than they do is a waste of ship space.