I've recently purchased the 9570 [I knew of the various throttling issues, but since I can't afford the X1 Extreme and there were no other suitable models] and tried to tackle the throttling problems myself.

First step I did was to repaste with Thermal Grizzly Kryonaut, but it seems that maybe my application was poor as the temp decrease on the CPU and GPU was not what I hoped for [coupled with the slow ramping up of the fans on the latest BIOS].

Next step was to tackle the VRM and power limit throttling issues. What I did first was as below, using stacked thermal pads to bridge the VRM to the bottom case



This did help the VRM become cooler but was not enough as it still throttled after 15 minutes of War Thunder.

Next I tried connecting the VRMs to the bottom case and to the heatsink at the same time



Using this method, the VRMs took longer to overheat at 30 minutes of War Thunder. This was a welcome improvement but not good enough. Next step I did was to undervolt and downclock using Throttlestop.
With a 2.5GHz max on all 6 cores and -150mV offset I can now play War Thunder for hours without noticeable throttling.

I intend to improve this further, but for now this is what I achieved. This is in a non air conditioned room btw.