Yeah, it's always going to be modifications to personal taste. I changed up damage rules to reflect changes in tech that we already see happening in just the last few decades. What I did was simply add damage the further you go up the tech ladder. So missile up to TL9 (and I'm talking standard spacecraft ones) do base damage (1D6). For every TL above that you get +1 dmg. So a TL15 missile does 1D6 +6 damage. This is done to reflect the changes to the technology, such as making a more efficient warhead, advances in miniturization, etc, that allow the same sized missile to pack more of a punch. It sidesteps the launcher issue (yay for standardization!), and it makes sense for players to seek out higher TL planets for better weaponry.