Rog Phone 5S, do not worry!
Don't worry guys, the Rog 5S is not an improved version, it's the same throttling, buggy mess that you have just with a slightly overclocked CPU, which literally makes 0 difference since the GPU is the exact same clockspeed, so in terms of your performance you will not see a difference between the Rog5 and Rog5S, infact this is just a marketing stunt so ASUS can milk the Rog phone until Samsung kills off the gaming market with their AMD GPU.
Without the cooler the Rog5S will literally throttle 40%. Yes boys and gals, we look at a whooping 40% performance decrease without cooler, so you better strap on that cooler and only lose around 5%-10% on sustained load.
I truly think the Rog5 is the last gaming phone from ASUS since they cannot compete with the AMD chip coming up in 2022.