Tamim is still a kid and Shakib/Jamie is trying to eat "BOROI" (plum) on his head. Selector should relieve him from VC and nurture this great talent carefully. He will come great after 26. For the being, captaincy should be rotated between Mash/Shaqib and VC should be the likes of Mahmud Ullah/Mushfiq/Imrul. The reason I said Imrul because it should be based on performance.
Young players like Tamim/Jahurul/Shafiul should be handled very carefully because they are our future. For the time-being Ash should be considered only for tests so that he plays only one way.