With regards to the Indian fringe spinners. I wouldn't call any of them World Class, but I would rather have Mishra, Chawla, Ashwin etc over other countries fringe spinners.
India's current leg spinners don't really fit the bill of how a leg spinner should be in India. India's two most successful leg spinners have been Kumble and Chandrasekhar. They both bowled differently to say Warne or MacGill. Quick through the air, pinning batsmen in the crease. Therefore Indian captains are reluctant to play (normal) leg spinners, as they tend to go for more runs. Additionally India loves playing left arm spinners, therefore a left arm spinner will be priority over a leggie.
With regards to Ravindra Jadeja, he's crap. Full stop.