I don't disagree with what you're trying to do, but that wording sets up a bit of a timing problem.
When does Team B gain possession of a scrimmage kick that goes out of bounds or crosses the goal line? One could make an argument that when the ball becomes dead, it's still in Team A's possession and only becomes Team B ball after evaluation of the play. Therefore, the ball becomes dead in Team A possession and doesn't meet your criteria. It may be a bit of fly poop in the pepper, but I don't think it's as straightforward as you're hoping.
You could also use this argument not to apply the exception. If, at the end of the down A/K is still technically in possession, then 10-4-2 exception would not apply, and B/R would have to accept a 5yd from previous spot with untimed down, or decline and go to overtime. Which would be ideal.
But still, that wouldn’t work either, because the exception states that k is not the next to put the ball in play. So, because R will be the next to put the ball in play, the exception still applies. But, where is R going to put the ball in play? If it’s the succeeding spot, it’s the first play in overtime, but that depends on how the coin toss plays out. So, technically we can’t even apply succeeding spot enforcement here because we don’t know who will have the ball. That’s why succeeding spot language is bad in the exception. Much better to use the language suggested.
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