You can get some good use out of some of them, but eh. Honestly, I just used a Kantrael (because it gets an actual optic!) or a shotgun (still very good at range) until I got a bolter.
I seriously think we should get some weapon customisation in the form of optical attachments, and I think autoguns should get extended mags.
AND I still want to be able to change my fething firemode, regardless of ADS (which would help out autoguns a lot too):