Yes, they improved in playing them in the latter ODIs.
India's positives in terms of future players is that Yuvraj continued to show that he is still a class middle order batsman. Gambhir and Uthappa showed that international level is not too great for them (judging on how they handled some of the world's quickest bowlers - without much trouble - less than Ganguly even) and that they should be able to take over from Tendulkar/Ganguly when the opening pair retire. Uthappa is a good fielder too!
Piyush Chawla really showed that he is a fantastic bowler and I strongly believe he could be a world beater in tests, the extent to which he destroyed Zimbabwe in those two games was reminiscent to an inform Muralitharan. His fielding is very good too due to his speed and enthusiasm, though that may die out a bit as he gets the wrong side of 25, but that is still 7 years away
. Zaheer Khan has continued his magnificent form and with a bruised heel, still troubled the England batsman, I truly think that with the heel rested in the twenty20 championship, he could be even more of a threat in this year and the next.
HOWEVER, there are a lot of negatives. Powar, Munaf, Ganguly, Dravid, Zaheer are awful fielders by any standards but I believe that with the right coaching, they can be on the right side of absolutely useless. India still search for the second seamer in both Tests and ODIs (never mind the third):
-Muanf Patel: lazy, slow, inconsistant
-Agarkar: expensive, often unproductive
-RP Singh: Too 1 dimentional and fitness in bowling spells seems to be an issue too. In one game alone (the first one IIRC), an average pace of 87mph dropped to one of 84mph.
-Sreesanth: Expensive in ODIs and too often wayward in tests...too much of a bipolar bowler.