I agreed with MSD statements, Youngster Ruturaj Gaekwaud has no spark in him , even tailender Piyush Chawla could bat better than him.
As far as Suresh Raina replacement, they could have gone with best replacement available in middle order was Yusuf Pathan he could have stabilise middle order batting, not saying he is same like before as a batsman, but still a match winner could have atleast won 2-3 matches on its own with his batting. He could also given CSK 2 overs of spin if required.
Jagadesan was good but Yusuf Pathan was best choice CSK could have opted for