1. So end zone plays involve the official's judgment to a much greater degree than plays outside the end zone.
2. He'd have to maintain control when he hit the ground in that case.
3. So there wouldn't be any more fumbles than there were in 2014, the last season that was played without the "upright long enough" rule.
4. The more comments like this I read, the more I realize that there are a lot of people who probably need every possible football move to be spelled out. I don't think that's going to happen, or even that it should happen. I'm OK with "perform any act common to the game," as it should be obvious that this wouldn't include losing the ball or simply falling.
5. There are currently two standards in the rule book at the same time for becoming a runner. It just depends on which one the official wants to apply. That's a problem.
1. So add even more officials judgment to determining a play? Not.
2. So keep the going to the ground when going out of bounds, except if in the end zone, in which case it's the judgement of the official. Well that simplifies things.
3/4. Think intent here. The going to the ground rule is to allow the receiver to gather and secure the catch. You do say that the still need to be a runner or make a move common to the game, except regarding points 1 and 2 above. So yeah, what do you consider qualifications of this if a player is falling down while catching the ball? Number of steps? Tucking the ball away? Reaching out with the ball? These are yet even more judgment calls.
You could easily make the Dez catch a catch this way. And the two or three examples we are talking about the receiver retained possession of the ball after the ball contacted the ground. But let's just say in the Dez play that he wasn't touched down and the ball got away from him and squirted through the end zone. Are you ready to call that a fumble?
And I do think there will be more fumbles. Guy is diving for a ball or catches a ball off balance, but for a second has two feet down and the ball in hand. But as he continues to fall he uses the hand with the ball in it to brace himself and the ball comes loose. Fumble? Or as he's falling a defender drills him and the ball flies out. Fumble?
5. Not sure of the two standards you are talking about. There is a time element - the example of a guy catching a ball and with out moving being given some time aspect to secure the ball. This doesn't really ever come up though. A guy is never going to catch a ball and simply not move. But it is there for simultaneous contact by a defender who forces the ball out. Then there is the or becomes a runner. Fairly easy to determine, but still a judgment call.
Now what I think you are referring to is this must be upright idea. I've never read that in the rulebook. They do say if you are not "upright", ie going to the ground, that if the ball contacts the ground you must maintain control of it. And we covered that already.
So, did Dezs play look like a catch? Yes. Could they revert the rule back to make it a catch? Yes. Would we then need specialised rules for end zone and boundary going to the ground rules? Yes. And would there be complaining of fumbles on even more than the handful of plays being impacted now? I think so, yes.