I just want to mention, this driver is used for more then a week, I personally use it and my friend with huge pool, with more then 600 gpu's, all of them 470/480, working like a charm.

Just to be clear:
1. You must use Clymore v9.8
2. Use -cclock / -mclock in Clymore, to control clocks of your gpu's
3. For voltage use AB, it is working well. I personally test, voltage control working fine via AB, fan control to, just gpu/mem clocks need to be used via Clymore commands.

There is some minor bugs with RX570 cards and new Clymore, but it is also something what can be solved easy.