The automatic look sensitivity is something I experimented with for the upcoming switch port. Basically, the aim sensitivity gets lower, when a valid target is near the crosshair. You can set the sensitivity with a slider going from 10% to 100%. With 100% being no change to sensitivity, even when a target is in range. At 50% the sensitivity is halved when a target in range and at 10% the sensitivity is one tenth of the usual value.
The button to change the base appearance appears in the base exchange menu, after finishing the final mission.