Once the ball lands on a player you go to catching the ball rules on page 13... no longer a kickoff ... and if it then goes out of bounds it is subject to the normal "throw-ins" rule.
Read the whole excerpt you posted. It ends with "if the ball scatters or bounces off the pitch or into the kicking team’s half, the receiving coach is awarded a ‘touchback’ and must give the ball to any player in his team." So if at the end of the kickoff the ball is off the pitch for any reason then it is a touchback. You only go to catching the ball for the purposes of trying to catch.
For confirmation of that see the FAQ at the back of LRB6:
Q: If a player from your team fails to catch a ball from a kick-off, and the
ball bounces over the line of scrimmage is it a touchback?
A: Yes, any event that causes the ball to go out of bounds or over the line
of scrimmage during a kick-off results in a touchback
Any kickoff which does not end up in the receiving team's half is a touchback. Rulebook, page 6:
If the ball scatters or
bounces off the pitch or into the kicking team’s half, the receiving
coach is awarded a ‘touchback’ and must give the ball to any
player in his team.
I have not proposed anything. I am against the move to 2 minutes. Please stop trying to push this onto me: it's not my decision at all. All I'm doing is acknowledging and ensuring that the metrics don't change halfway through the test.
The evidence is that a majority of people seem to want it. I've made my own opinion of polls, their use, and this poll in particular, clear to the admin team, but if it is good enough for them then it's their call to make. Not mine.
Longer-lived teams, different reasons to play (e.g. no playoff), more concessions (and therefore noise - ~22% vs ~45% COL vs CCL last I looked), fewer AFKs (because people just concede).
But hey, if you think there is something useful you can mention from the data available in COL then please, let the admins know!