Is there supposed to be a shotgun soldier in “We’ve Got Hostiles!” because in the original mod I don’t remember any shotgun soldiers, nor in the original Half-Life.
Yes, I believe (in the mod at least) you could get the shotgun in WGH. That’s what the wiki page says anyway.
I think it’s still an overlooking as the devs wanted the shotgun to be a reward for completing WGH.
Shouldn’t the SMG be the reward for WGH, pistol and crowbar for unforseen consequences, handgrenades and shotgun for office complex and 357 for blast pit?
May or may not have noticed, the developers didn’t intend a 1:1 recreation. “Should” is quite subjective.
Also you can get frags in UC. 
I’ll ask John or Chris about this. I always thought this was weird too.
And yes, there is no “should”. This remake is our own direction. Whether you like that or not is another matter, but there’s no “should” or “should not” in this.