I think it's great that we have the capability to do this and hopefully I'll find time to learn and use Forge. However, not everyone will have the time or the interest in using Forge so while it can be done, I recognize this as something that could be a useful addition to the pre-game setup - perhaps in the next release of Sins if not Rebellion.
People who realize the Devs will never perfect the game like we all want them to and attempt to do their jobs for them, like most of the modders do, might I add, are the ones who shall swim.
I agree that we cannot expect the game to be everything we want. I've been working for a software company almost 10 years and one thing I've learned about developing software is that it can be on time, on budget, or bulletproof, but only two (never all three). The two you choose will depend on where your business is at. I don't expect Sins to be bulletproof (perfect) so I'm not going to ask for every improvement I can think of, but only improvements that I think are worth mentioning. This just happens to be one of them, granting a little more control to certain variables when playing a random or pre-designed map.
I salute Ironclad for their hard work and consider Sins a great achievement. More than the quality, I love the concept. So I hope that some of my suggestions, or even just one, will add more value to what is already an amazing game.
Here's another idea for future development and maybe this would be easier than adding a pre-game option. For random map generation, there is a text file with parameters that can be adjusted. If there was a super weapon line with the boolean value 0 or 1 or a value between 0 and 4 to tweak the number of allowed weapons, that would also work.