A problem with those types of indicators is that they can often alternatively indicate an attentive driver handling situations the assistance features don't understand.
A driver may seem to be drifting in lanes because the car's sense of the lanes may be wrong, or may not fit what traffic is actually doing. Large variations in speed in areas where the speed limit isn't changing could indicate difficult traffic or road conditions. Slow reactions to green lights could indicate congestion, obstructions or heavy pedestrian traffic (eg, needing to wait for late crossers at each intersection in a busy city). Climate could be an indication of the condition of passengers, especially for people who specifically drive groups because they aren't impaired when the rest of the group is.
A driver may seem to be drifting in lanes because the car's sense of the lanes may be wrong, or may not fit what traffic is actually doing. Large variations in speed in areas where the speed limit isn't changing could indicate difficult traffic or road conditions. Slow reactions to green lights could indicate congestion, obstructions or heavy pedestrian traffic (eg, needing to wait for late crossers at each intersection in a busy city). Climate could be an indication of the condition of passengers, especially for people who specifically drive groups because they aren't impaired when the rest of the group is.