Thanks for the reply!
I agree, it seems to be a very vague card. Personally I think the card's text aligns better with the more restricted interpretation whereby you have to increase your distance from every enemy fighter, but:
1) (as you rightly said) it doesn't make sense for a fighter on the opposite side of the board to affect the push;
2) this restricted interpretation makes the card pretty terrible, so I'm really hoping it's not right!
As for replacements, I'm already using sidestep in my deck but am considering swapping in flickering step (although I never seem to roll any crits for it ).
Do you mean the GW Shadespire page or is there another community group? I haven't heard of anything like that so it would be interesting if there was something.