Irfan already bowls a lot of slower balls and cutters.
Kaif would be a great choice. May not be the best batsman we have, but is brilliant in the field and excellent tactically. While he was in the team he was the fielding skipper, he set who fielded where.
Dinesh Karthik is a fighter, and seemed a very good, innovative batsman, but has just lost his form and kinda become a walking wicket. He was brilliant behind the stumps too, but he needs to start getting some runs.
We also need a new spinner. I've always wondered why Amit Mishra, a legspinner with domestic success, never got picked, and after the IPL I am still wondering. Bhajji is proving to be a bit of a problem, he hasn't been taking wickets and is getting into a lot of off-field trouble. Ojha doesn't look ready and Piyush shouldn't be playing Test cricket. Maybe we might need to give Viru and Sachin more bowling in tests, and Yusuf and Raina in ODIs. Maybe Kumble should return to the shorter format. Or call back Ramesh Powar. Or even better, call back Murali Kartik.
Balaji needs more time. Glad he's back though, nothing tops his smile!
Trivedi looks a decent bowler. He might be good in English conditions, and can apparently bat a little too. Our pace attack is quite nice - Irfan, RP, Sreesanth, Zaheer, Munaf, Ishant, Praveen, Gony - so that really shouldn't be an issue. Agarkar, Balaji, Bose are all knocking around too, so in case of an emergency we can turn to them. Yo-Mahesh looked good in the IPL too, as did Dinda.
And our batting doesn't really need anyone new. Some names have already been mentioned - Badrinath, Tiwary, Nayar, Dhawan, Kaif - so there are plenty to keep the starters on their heels.
Only two keepers have been used recently - Karthik and Dhoni - so I think Patel needs to return. He's been batting brilliantly, almost unstoppable, in domestic cricket, and has improved with the gloves.
So thats it really I guess. No stand-out allrounders in domestic cricket - JP Yadav was already give a shot in ODIs and is a bit old, Laxmi Shukla isn't bad but might not be NT level - so I guess these are pretty much the players likely to play for India in coming years.