The only thing is the low light with the a6000. Anything above 400 ISO and the noise is huge. And the 35mm is usually fine but for streets something a bit wider would be nice. Especially in old Soviet towns or cities where things can get very narrow, or architecture is very grand and you just can't quite capture it in all its glory.
The Soviet lenses I mentioned are wanted also for their character. Like the Helios the bokeh they produce is beautiful, very swirly and unique. With some of that decreased sharpness and increased glow with the older glass. Perfect for video!
For photography, a camera with high ISO values is necessary. I've always owned Nikons and I'd like to buy a D7500 model someday. The ISO on that camera is very high and there are no lighting problems; it's also perfect for video :)
Yeah. Daylight hours are great since the sun here is really strong, but once it starts to dip and the ISO needs pushing, that noise very quickly ruins an image. Especially for night shots where that mist filter would be perfect. And if I want to use the polariser for anything, that already blocks a lot of light and requires some adjustments. Also just generally the dynamic range. Not the best compared to the newer stuff.
In good light it remains perfectly fine. I wouldn't say it bothers me at all for the vast majority of things I shoot, just I know I'd do a lot more if I had access to some additional features.
I've never had the chance to shoot anything Nikon before. Even their 35mm cameras. Though recently they did release the Nikon ZR which is a collaboration between them and their recently purchased RED cine lineup. I've seen great things from that online.
I hope you can get a camera with better ISO levels, however I still maintain that your shots are truly great :)