finished the thread now. Some of these "low hanging fruit" "throwing the baby out with the bathwater" are absolutely normal expressions from everyday speech that i have taught in EFL lessons.
Getting "more bang for your buck" relates to artillery i think, and is perfectly descriptive and a less boring, and definitely eye catching way of, say, expressing disappointment in an outcome.
The granular thing - i always think of it in connection with the boss having the "helicopter view" (hate that because it is so the opposite of helicopter parenting) whereas those of us hacking away at the coalface of the details of the job are getting the electron-microscope-style granular view. As in very close detail. It conveys all that in one word which i find useful.
And sure a lot of idiots pick them up and run with them (other sporting analogies are available) to fit in with the way the higher ups talk. There is no harm in that as long as they are not causing the business actual harm.
I used to work for an Asian corporation who were absolutely enamoured of the latest business-speak book. So we all had to read and inwardly digest: Good to Great, Who Moved My Cheese, Don't Eat the Marshmallow etc. We had meetings and workshops about them. sigh*. And then they discovered the phrase "paradigm shift" and it all went pear shaped.
*anyone remember the excellent "Martin Lukes" column in the FT? The American in that one used to sign off her emails with "i'm smiling at you"