So, my suggestion was that you can customize the way ranged weapons work. So, let’s say that you have a catapult, and it’s somewhat weak… you can directly modify it yourself! (This could be done before you even have the catapult made, and such.) So basically, this offers much more customization in your battle tactics.
What you’d be able to do to catapults, and possibly other ranged weapons of that type:
Customize the mechanisms in the catapult, by making it more powerful, shooting further, it being able to carry more/heavier stuff… etc…
Add little automated things to it, such as some kind of motor to make it more powerful, and such.
This could lead to some nice ways to battle… like having shorter ranged, but more powerful catapults at the front firing range, and longer range, but weaker catapults at the back.
But, the catapults would need to be balanced as well, to stop you just putting everything on the catapult and having it over-powered.
So for instance, if you were making it carry heavier/more stuff, it would fire a shorter distance and be more powerful, or if you were focusing on the range of the catapult, it would only carry lightweight stuff and do less damage.
Oh, and this is all a concept. I’m not even sure if catapults are going to be in the game!