No, they can't start adding new engines at this stage.
They have to close it off and then extensively test
Adding anything new will only delay things, can't keep shifting the goalposts.
Very true. Well maybe in the following sim? Grant it, electric powered aircraft are no where near anything like "common", they are all pretty much experimentals so we are a few years from a production one. So I guess it would make more sense to implement them in the the following sim after Flight (hopefully by then there will be some at our local airports).
Still, I keep reading about these birds in the EAA Sport Aviation magazine and they sound like a lot of fun. little vibration, FULL throttle (as in 0% throttle prop stops turning!), very small engine instrument panels, no worries on mixture or carb heat, very fast rev up, and eerily quiet operation. Although the last one has mixed feelings for me, love the sound of a piston 8-)