Hi Pontius,
It's not bright enough to roll right to intercept the centreline. It's not a flight director that is taking into account turn rates.....
I beg to differ.
During line up at taxi speed, the TriStar PVD would be steady with an intercept heading towards the centre line and then show a turn command to align with the centre line.
It was certainly more sophisticated than a simple localiser deviation display, and it considered:
airplane yaw rate
cross body acceleration
localiser deviation
localiser deviation rate.