This all depends on what you think a checklist is for. As far as I am concerned, it's to help you remember the vital things that will kill you if forgotten. What will kill you on start-up? Not a lot. Taxiing? ...erm. Take-off? Now here's a list building - Fuel, Flaps, Trim and Prop would help. After take-off, cruise, descent, approach etc. - this is standard flying. Landing - Gear, Flaps and Prop. Anything else is a bit superfluous. Adding pointless extras dilutes the importance of the "BIG" ones.
An example of this is my plane. It has seven airborne items, two after take-off, two approach and three before landing items. Why a bug smasher should be much more complicated is beyond me. The entire checklist is on one side of A4 in 12pt CAPs with plenty of white space, margins, logos and headings.
PM