X52 Amatuer. [No, a pro but its Really Really Old. Like Me.]
A green arrow pointing forward, or aftward for REVIN [REverse INdicator], would be a super Ad. Thrusters offline? Red plus add eg. a checkerboard hash or slash, a visual change to make the colour-peception-challenged CDRs Happy[-er].
Can't recall exactly how many times I've hit reverse when docking, logout, get some gnosh [no pints- 12hrs bottle to throttle RULE] and forget that I went reverse before going Feets Dry. Yes, the speed indicator does start at the forward instead or aftward edge- but that is not visible until actually Trying It Out.
There's no visible indicator, no fallback options eg. "stick yer sorry head out the cockpit and EYEBALL/VERIFY LG DN" [Landing Gear DowN/[SAFE]] until throttle is applied. Want to verify? The "Hey, Watch This, Hold My Beer First" crowd can be ... entertaining [usually ending badly ...] ... ckout the LG DN on a Spitfire. Those clever Brits, can't see the gear fm the cockpit but there is a[n] [air turbulance/lift killer] tab indicator poking thru the wing when LG DN.
BTW gr8 idea on splitting the throttle- tactile feedback at center/zero throttle isn't there, but its something. Something known before the actual try-it-and-see method.