Minor one: Conventional start, going to design a conventional engine and the name that appears for the engine is simply "1 EP ", not "1 EP Conventional Engine". Same occurs if you go back to conventional engine tech from a TN start.
Also very minor consistancy issue, in research and on the drop down when designing engines it is "Ion Engine Technology", but "Ion Drive" when naming the designed engine as opposed to "Magneto-plasma Drive Technology" with "Magneto-plasma Drive".
Edit:
Size 50, power x1 engine should be military and are listed as such in the component design screen. However if added to a ship in the class design screen they do not change the class to military, it remains commercial unless another part that would change it to military is added.
Only tested with conventional engine so far.