re: Handball practically in the goal

IDK, I don't think it'd be that hard. It'd come down to three questions.

1) First, does the ball strike the player in the arm/hand?

If no, obviously, play continues. If yes, move on to questions 2 and 3:

2) Is any part of the player's foot/body on the goalline?

3) If the ball didn't strike his arm, would it have definitely gone into the goal (or would the ball have gone wide, maybe hit his body, or perhaps have been saved by the keeper)?

If the answer to both questions 2 and 3 is yes, it's a goal. If the answer to either question 2 or 3 is no, then it's a PK. I don't think it's that difficult, in all honesty, and if there's any doubt, then the ref can just award a PK. But in cases like today, when it's really obvious, then just give a goal.