All said and done 5 more matches means more players to be tried out. Those who are sure to be on the plane to WC, needn't feature.
Among Batsmen -
Dhawan
Rohit
Virat
Rahane
Raina
MSD
Bowlers -
Bhuvi
Shami
Ashwin
Jadeja
That is not to say they shouldn't get a game even, but for the most part, they should be rotated. The key area where India need options is fast bowling. I am not so sure that Umesh, Mohit and Ishant are nailed for the final squad. Axar, Mishra and Yadav need to be tried out too. Mishra especially can really prove his credentials against SL, they are a side that play spin well. Rayudu too seems to be on his way to the WC, but not nailed down. These are the guys I think, that should be given more matches.
Those who need to play -
Batsmen
Rohit (He is nailed on, but needs matches after his injury)
Rayudu
Unmukt Chand
KL Rahul
Jiwanjot Singh
Yuvraj Singh (He deserves one last shot)
Manoj Tiwary
Manish Pandey
WK
Naman Ojha
Samson
Bowlers
Mishra
Axar
Kuldeep Yadav
Mohit
Umesh
Mohit
Varun Aaron
(There is the squad for the SL ODIs
)