Razor wires should be connectable to HV wires to make them not only do the 1 hp dmg but instead turn them into an energy consuming electrical fence. That does configurable dmg. Because trying to set up an electrical shocking defense with the hanging lies is difficult and the razor wires hold that potential (would drain a lot of power thought XD)

An ammunition case to store ammunition for the rail gun and one for the revolver so people don’t have to run around with stacks and stacks of ammunition in their inventory! (maybe with bauble function)

Being able to shift click the revolver to instantly push out empty cartridges (if its full of empty ones movie style XD) and maybe a function to after opening the revolver also shift click them in thereto fill it back up with them.

How about adding an immersive steam punk looking little robot thingy that runs on cogs and biodiesel XD he could like follow and collect stuff or simply do minor things (maybe combat)

And lastly did you ever think about making an immersive engineering add-on with some mobs? I think a set of steam punky looking mobs would be really neat. To have to go along with the mod doesn’t have to be in the main mod.