There's currently no way to center the camera over a builder that you select with the "cycle through builders" hotkey... in most games it centers over them when you cycle through them... I think most people inclined to use that hotkey would prefer that. The only other solution is another hotkey to center over "selected unit", or binding the builder to a control group, which defeats the purpose of the cycle key.
Also a great buff to QoL would be if buildings were control-groupable.
Other than that the game's fantastic! Keep it up.