I didn't go into full detail about why I hate the design so much (I could seriously do a long length post about it) but the fact it looks SO similar to the Combat Shotgun irritates me, they didn't even bother to name the meshes something different in the files.
If I'm not mistaken you even see a M14 in the intro video.
5mm or 556 would've done wonders, they both are the least utilized calibers in the game and I shouldn't need to explain why that's a terrible idea outside of stuff like Railway spikes
Say what you will but moving to the EC was the better move. 1 & 2 gave a good conclusion to the WC, and later NV gave the WC storyline a perfect ending (until it got BTFUp, thanks amazon!) I think 2 full games is enough for that portion of the US.