Agreed. Military coup especially will be very very difficult. BAL loyalists are everywhere in military. BAL ensured that over the last decade. Unless US is able to build a fringe element, but chances of that succeeding is low.
Plus, both BAL and BNP ensured since 1990s the military participation in UN missions, which are highly lucrative for military personnel. Which is why we haven't seen BD military directly taking power since 1990.
BNP is a mess organizationally due to ALs crackdown, but if US wants a regime change- BNP and a coalition of anti- BAL parties are their best option.
So yes, it seems BAL can resist pressure for now. But once US start going after BAL leader and affiliates illegal wealth outside Bangladesh, I am not sure they can hold off for long. Anyway, let's hope we get to stay neutral for as long as possible.