One of the worst holes in Lightroom's attempt at providing a solution to tethering via auto import (hot folder) is the inability to automatically apply any changes to processing settings to the subsequent captures without a slow and cumbersome method using user presents and specifying this preset in the auto import settings. They do it with tethered capture, by providing a develop setting called 'same as previous' but they don't allow this for auto import. All professional tether software for medium format cameras does this by default. Adobe really needs to step up and decide if it wants to compete in this arena rather than just offer a token effort.
Add to this that auto import is quite slow and the result is that using an unsupported camera and the manufacturer's software for a way to shoot tethered in Lightroom is quite cumbersome. However Lightroom is so good at processing that it is worth it, just. My method of getting around the lack of develop changes being applied automatically to auto import is to change the default settings for files from whatever camera is being used for auto import, so that whenever you make a tweak to exposure, colour balance or whatever, you select 'set default settings' in the develop drop down menu so that all new captures have these settings. It is still cumbersome, but not as slow as creating a new preset then specifying that preset in the auto import dialogue box. In fact I have created a keyboard shortcut so that whenever I make a change I hit my shortcut followed by enter before I go back to the camera and continue shooting. After it becomes a habit it works quite well. However it doesn't apply brushes, gradients, crops etc, so it's not perfect.
Ben