It's not against India only.
To be honest, he has been among Poms best player for last 3/4 Series. Won a Test against PAK, should have been MoS had ENG won the 2nd Test & now this. I think, whenever he plays Asian teams, he'll be among top English players, because he is their best Spin player with bat & does bowl tight.
Against 4 Asian sides, this year (+ last year in UAE), his batting innings are -
35, 11; 1, 1; 14, 22; 0, -; 155*, -; 25, 9; 23, 2; 2*, -; 63, 86*; 108, 32; 68, 14; 10, 0; 99* : That's 780 runs in 13 Tests at 43.33; but it doesn't tell the impact, for his spin play against opponents best bowlers.
With ball as well, in 12 Tests (hasn't bowled yet in IND), he has taken 33 wickets @ 41.87, with a 5 for. If I take out those 3 Tests against SRL in early summer; it's 31 wickets in 9 Tests at <39.