Slitherine

I just discovered that when you have Rudel with double move, you can move away from an airfield but still take replacements with your second move.

Yes, it's a neat little trick with Double Move. Not that common, but there might be cases where you want to move within fighter escort range and then make replacements. A bit silly, but I think it's too narrow of an exploit and the impact is too small to change it.

Yes, this is a good way to spend the second move, and it works for any unit with the trait. The overrun trait offers the same opportunity (but only after an overrun, of course).

you can rebase him with the second move aswell

Rudel is the best hero ingame (for me), just because he delivers so many options to use him. I always combine him with a double move or double attack hero depending on what trait i picked for him.
but he can fill every role you want due to his traits and with additional heros. Playing without him at all make the game much harder in 42 and 43.

Hopefully we will see another hero on this lvl in 44 or 45.