So I did some digging on the site and I've confirmed for myself the obvious stuff presented with this figure the only issue left for me to resolve is with the throwing of the object itself. Where I game the GM said that because it was a running shot it was treated purely as a ranged attack however other characters that throw objects are (at least here) treated like TKers are and they allow them to throw their objects at figures in cover, with stealth, because they are targeting the 'square' they are on.

So my question is, by the same logic, if Captain is throwing his shield, which is a light object, can he not designate a single square and lob his shield into it rather than the default ability it conveys?

Edit:
Hope this didn't sound too confusing.

An object "thrown" using TK targets the square, allowing you to hit a stealthed target. Throwing an object that is being held via Super Strength (which is the only way to hold an object) is a Ranged Combat Action that is targeting a character itself, so whether it's Captain America throwing his shield with Running Shot or Juggernaut just standing there throwing a standard light object, Line of Fire would be required for both.

Thanks, I was told incorrectly for throwing objects, much appreciated.