I also have the Matricom G-Box Q. I've tried both drieschel's and Kerber's (aka. surkovalex) builds and source.
Your temp's are about the same as my unit. Both of these builds are set to use the Performance CPU Freq Scaling Governor. So, the CPU is pretty much running at Max speed all the time. Kerber/surkovalex actually sets this in the Kernel Boot command line too.
As for the remote issue, the 7.0.2 ZIP from drieschel has the correct remote file in /etc/amremote , it's just the wrong filename. He corrected this in latest GIT source. You could just copy /etc/amremote/amremote.conf to /storage/.config/remote.conf with drieschel's current 7.0.2 ZIP install.
I've also had issue with Kodi locking or crashing randomly using both builds.
I had issues resuming from suspend mode with both builds, mainly bluetooth and wifi functionality. As you know neither actually PowerOff, they suspend since PowerOff just reboots the unit.
I've used the GIT source from drieschel, Kerber and latest from kszaq.
I've kind of created my own using Kerber/surkovalex source for the Amlogic/M8 project with kszaq's latest linux and kodi patches for S805 and S905 and modified what was needed for the meson8 linux kernel build. I'm still load testing it...
I prefer surkovalex's project since it had HDMI Audio for passthru support right away.
So far the Power off is working now (does not cause a reboot).
Still testing some things to try and get suspend/resume stable and functional.