Right now there are too many similar guns that basically does exactly the same thing, so why have them? eg. famas - aug (only that aug has a sight) aac honey badger - acr - kac pdw - kriss vector - hk416 - mp5 (all these does the same thing) I suggest modify them to make them specilised in one thing. and remove some of them. maybe some with bigger clips but less damage and some with lower fire rate and more damage something like that
There are several guns that have a variety of sights. Just go into your setting and enable them. All the things you are talking about have already been implemented into the server. I suggest trying all 34 weapons before you make a conclusion if you haven't already tried them all.
Famas is alright at best but still better than the hideous aug. the pistols are very very different from eachother.