Your time is valuable as well as 2 $/ month but I like the approach.
I don't suggest moving to any linux mining distribution.
I am suggesting that you have a fine tuned rig, just let it run and find another motherboard etc for the rx590.
If this is not viable and you have time:
change the driver and use overdriventool to setup overclock and undervolt easily
Use TRM instead of phoenix, not so easy to setup but much stable with newer driver
Keep an eye also on the amount of virtual memory, PSU limit and give a look at the cpu utilitation.
Because may be its not the new driver the problem
i know i am trying simpleminer at the moment, it gives me lower hash rate than my manual tune on windows. i don't think it is that special software maybe makes it a bit easier for people. $2 is not important really. i probably lost 10 15$ already in few hours not mining. Simpleminer hasn't got the driver for rx 590 so i am runing 11 gpus so that didnt work for me.
thanks for the suggestions i might as well just run my fine tuned system without the 590