Splendid
The modding system is probably not that modern friendly, but an experimental mod in dom2 will probably make more modding possible in dom3 as it lets us see what could be done under certain circumstances.
Weapon modding is lacking in regard to modern armies. Sound and graphics wise at least.
Also there will be some strange and fun stuff like chest wounded tanks. Perhaps it's leaking oil. But the same affliction doesn't fit soldiers.