I thought about the same too. Even now Shakib, Mushy, Tamim has already 5 years of intl experience. By 2015 they will have around 8 years, which is vast experience. Others will catch up too. None of them will still be 30. So the future surely looks bright. That's one of the positives of debuting cricketers while they are so young.
Anamul/Momiunl already made their debut while their counterparts from other U19 WC countries will have to wait for long. Unmukt Chand and Babar Azam at least have to wait few years.