Two mods that i think would be great is Computercraft and Wireless redstone. Then you could control your immense base from one room! I do know that they are both compatible with IBCM mod and UE.
I agree with Slenderman, we should add a gun mod but unlike gman i don't think we necessarily need UE on the guns. But if that is important they could be fueled by existing, or special batteries, Also maybe more types of bullets could be added like the diversity in grenades.