This happened in the previous two fallout games as well, for example, new Vegas did not have the combat shotgun or the slingshot weapon that were in fallout 3.
theyll be there just progress and youll find them
Have you considered possibility that those weapons are in the game and you haven't explored enough or bartered with the right traders to find them?
I looked up the wiki to see what weapons are in the game and i didn't see a lot of the ones that i liked in there in there so idk are wikis unreliable or something? Because i'd really like to know.
thats due to the fact that FO4 is just released and the wiki is updated as their volunteers play the game (or someone buys the guide) and then add the info to the wiki .
also
http://imgur.com/TZz78J1
submachine guns do exist
I'd really, really like a crossbow ... maybe a future DLC or a mod will add it and if GenerateFNISforUsers works for FO4 or is made to work for it, the proper animations will be in as well.
Not the traditional 10mm SMG. The 10mm Pistol does have a receiver that ups it's RoF (though I haven't made it, so I don't know if it's full auto or not), but the resulting weapon looks just like a normal 10mm Pistol. Also, there's no banana magazine; instead, you can swap the 12 round Pistol Magazine for a longer 24 round version, but it's literally just a longer version of what the weapon comes with stock. So while you can have a rapid-fire or full-auto weapon that uses 10mm rounds, the resulting weapon looks just like a 10mm Pistol, and not like the 10mm SMG from previous games.