AFF asked about adding reverse thrust to the Electric Engine.

Blindly adding to the current engine can not be fair, such engine should be slightly heavier and slightly more expensive due the propeller's tilting mechanism. See this for the reasoning.

The reasoning from @theonegalen convinced me. I will add the reverse to the current engine.

Hey!! As for KAX 2.8.0.2, the Electric Engines HAS reverse thrusters!

Closing this as I probably solved this one and forgot about...

Be sure to check this before working on the issue.

https://forum.kerbalspaceprogram.com/index.php?/topic/180268-141-kerbal-aircraft-expansion-kaxl-%E2%80%94-under-new-management-%E2%80%94-v2800-2019-0110/&do=findComment&comment=3558361

I think you're right about an engine that can reverse thrust in flight, but simply adding an option to mount the engine in the opposite direction, as a pusher, for example, would not necessitate the additional weight and cost.