I just installed Guild Wars 2 on mine. This is a VERY viable gaming rig!!
Only issue I found was that when you have a menu up (press esc) and use the mouse to click on it, it does not register the mouse click. Also, you have to use keyboard controls to select another character other then your last played (if you want too) and hit enter to play, clicking the Play button does not register the mouse. Seems more like a calibration issue with the game and the mouse (this is using hardware mouse FYI).
I installed and played Path of Exile as well. Needed a little bit more tweaking of the graphics settings, but over all did REALLY well.
Now, the mouse/touch issue. It has to do with Scaling. By default, the scaling is set to 150%, you need to set it to 100%. Having it at 100% will fix your gaming issues, but will make the desktop ALMOST unusable because of the size of the text. 1920x1080 on that small of a screen, text tends to be VERY small.
So, best thing to do if you want to game and have issues where you need to adjust the scaling, be prepared to tweak it.
To tweak the Scaling:
In desktop, right click on the screen, go to Personalize, Display. It is the percentage at the top. It should have "Larger 150%" selected, choose 100%. You will have to log out to apply.