Thin client from pinephone with external display

[0anubis0]

Hi!
I just got my pinephone and I tried a few images in a short rush. I want to make a thin client what I can use with a workstation, so I made my tests if the current images can support it. Most of the time the external display was unresponsive or instable so I used the arch barebone and installed kde-meta. It was worked well except the performance issues.
I experienced these issues:
-mikrotik ap is not seen, even 2G (other commono AP was good like tplink)
-ethernet over usb-c is slow. ~70 Mbit/s (lot RX drops)
-plasma slowness probably was gpu related

As I saw the gpu can render full hd and the ethernet over usb must be faster as well so what do you think? Is the think client plan possible? I am gonna go deeper with the debugging, but I am welcoming any useful tips