lens advice

My lens setup is below.

I am thinking of trading/selling my 17-50 vc for a 10-20 UWA or maybe another prime.

I would like smth wider for landscapes and i hardly use my 17-50. I always find the 30 f1.4 on my camera.

Am i missing too much in the distances 30-70?

In between 30-70? Not really. A few steps back and forth on either the 30 or the 70-200. If you keep going between head/shoulder shots and half body shots, you might have a problem, 30mm isn't that flattering for head shots. You can crop out afterwards of course.

But of course, you can change lenses Do you mind changing lenses and carrying an extra lens?