tuc, while true the main stumbling block is the pressure on staff officers.
Whatever one throught of General Melchett and Captain Darling they had time (perhaps too much then) to do staff work. Staffs did the enabling works to allow the men to do the work.
Now many layers of staff have been stripped, streamlined, and sent on op tours with posts gapped. From being above and detached, able to take a more relaxed and dispasionate view with proper oversight and review they are often reduced to day-to-day fire fighting the same as the frontline.
You can do with out staff for a short period but soon get bitten.
As an example, at one point not that long ago our chain of command at Strike was a flt lt with the next above being the AOC. All intermediate layers were posted/detached/gapped.