I want to overhaul the entire Airline Industry to make it more user-friendly.
My dumb brain doesn't understand and is not able or willing to learn beyond a certain point of systemic stupidity.
I usually fail the realistic sim test with heavys.

Warning systems:
-When flaps are down above maximum speed.....why does the fkng Main Warning Light Button flash and beep?
-That could indicate any number of control failures. Or a flight condition.
-Two systems mixed. It's confusing. Especially under stress.
-WTF is happening?
-Why doesn't the Flaps Light indicate instead? A more intuitive feedback system?
-Let the Pilot identify the specific problem.

Switches:
-All dash switches should be grouped according to function: Fuel. Air. Electric.
-Color-code the dash.
-Color code, or notate, ALL switches needed for typical proceduree: Landing requires flaps lights pumps for go-arounds etc.
-Critical switches are closest to the pilot and easy to reach.
-Critical switches such as Mag/Fuel should be double-protected with an extra procedure or a tactile surround. Are U sure?
-Perform tests to find out and prioritize what pilots need to do in an emergency.
-Organize accordingly.

Refencing a cough common U.I. glass-copckpit company cough:
-AIRSPEED IS CRITICAL!!!
-It is flight itself...
-Because the ass of any heavy with fly-by-wire is quite numb in a hurricane
-So why TF is this information displayed using a small sliding scale squashed into the small left side within a complex menu?
-Same with crtical decent rates. (Separate from actual aircraft AOA but more important)
-The information is very hard to read in a pinch.
-It should be big numbers at the top.
-Put it in 12" letters right in the center of the windscreen.

Airports:
-Runways should have flashing marker lights indicating direction. AND BIG NUMBERS.
-Color-coded industry standard.
-Lighter colors North or South or East or West. Whatever works. The Sun is to the south in the northern hemisphere.
-It should be uniform in all countries....

Taxiway markings to find port/parking/hanger/rest area/services:
(where do I even begin)
-Every major runway should have a count-down numerical system to last exit.
-GA? Or take a spot from United/Sprint/Delta? Ground crew might be confused.
-When landing, how about count-down signs to the last possible diversion to taxi? 4.3.2.1
-Blue lights. Yellow lights. White lights.
-How about a touchdown box?
-Taxiway is marked 3F. New airport. What do that even mean? Where does this road even lead to?
-How about a visual warning on the taxi strip before crossing a fk'g runway?