as an Arch user, I couldn't care less - never used AUR, never will... when people install some crappy "community" software, they better deal with the consequences
The only phone I had that overheated was a Sony Xperia XZ - and it was so bad, that "flagship" piece of crap was slower than a 3 year old budget Samsung.
Never had any issues with my Zenfone, even while charging, the phone never had to throttle the CPU/GPU.