Ashwin has not done badly at all. 2 wickets in the 7 overs that he was bowled for the innings. One of those wickets was of Rababa who was threatening to take SA to a bigger score.
Dhawan must be wetting his pants in the dressing room.
Add his dropped catches to his inability to face challenging conditions, he must face a lot of music in the few overs left today. I would actually not mind sending him out and have Pujara open with Vijay (I am actually serious - if Kohli wants his friend Dhawan to do well, it would make sense to not send him out to open today). Have a nightwatchman opener.