Excuse my ignorance but is it just the head ref looking at the difft angles and making the call? If you don't want full time refs, why not have a group of, say, 3 rules interpreters (i.e. lawyers, blah blah blah) whose job is to know the rule book better than the non-full time refs. During a questionable call, they assist the ref and tell him Rule 3.1.5c applies here. If there is a disagreement amongst the three, you would hope the majority would interpret correctly.
I'm still with Zero, too many stupid rules. Maybe after this, there will be a clarification of this rule (which is a clarification of a clarification already) and we will have the Greg Jennings rule. My proposal below:
Greg Jennings rule: when a player meets the following conditions:
1.)
plays for the Packers 2.)clearly has 3 feet on the ground
3.)and then subsequently loses the ball out the back of the end zone but
4.) doesn't complain because he is more concerned about possible personal injury,
...that shall be ruled a touchdown.
It will fit in well with all the other ludicrous, extraneous, superfluous and any other -ous rules you can think of.