A thread to state the obvious? Again?
Obviously you got a problem with your batting lineup. I mean, every bottom ranked team got problems with their batting lineup (Eng, WI, NZ). That's why they are ranked low.
Now the team has 3 players who could play the potential big innings viz Shakib, Tamim, and Imrul. Zunaid is out of form and gets starts, but fails to convert them into a big score. Same with Mahmudullah. So you are left with Mushfiq, and Raqibul, who I agree needs to be dropped.
About the PP, I agree about taking PP at the right time, but I can also understand why they're reluctant to take it. We have seen a lot of collapses in the PP for other teams - and BD themselves used to lose quite a few wickets in the PP. And due to the lack of batting depth, there's always a risk of not playing out 50 overs which is even worse. Since Kapali is back, hopefully that issue will be resolved now.