I only saw him bowl in the third session of day one.
My worry for Ashwin is that he is not adjusting to the conditions quick enough. Pune and particularly Bangalore pitch have lots of cracks. That perfectly suits Lyon style of bowling who bowls a little flat and gives more over-spin. That allows to extract more variations from the cracks. Ashwin should have done the same but he didn't until the fourth innings of second test.
This pitch was different. Ashwin was bowling the same way as he did in the last innings. He was getting little drift and turn that was manageable. Among all the spinners in this series, Jayant puts maximum flight and side-spin on the ball which complements well with a good pitch like this one. Moreover, Maxwell was vulnerable at the start of his innings. He was playing everything on the backfoot. Ashwin didn't bowl full enough at that time. Jadeja did and got few of outside edges, bat-pads and lbw shouts. Maxwell eventually settled down and started to play fuller bowls on front foot or by coming down the track.
I didn't watch a single ball today so don't know if pitch has started to wear on but if it holds well for day 5, I don't see Ashwin being much effective tomorrow.