I use "press forward" as view forward+up, other views as is ("normal" left/right, fwdleft etc) plus "pinky" (as 2late4u) switch as "View Up" modifier. Gives all 17 view needed in flight. The only reason to look down would be to look at instruments on some planes. It's not (IMHO) a vital function so I just map it to a secondary button on a throttle...