I still can't believe the NFL or college hasn't adopted the XFL kickoff rule, which has a 92% return rate, the same starting field position and no major injuries. --- RT @TomPelissero The #Eagles also submitted a proposal to adopt the XFL-style onside kick substitute, permitting a team to maintain possession of the ball after a score by substituting one offensive play (4th and 20 from the kicking team’s 20-yard line) for an onside kic… https://twitter.com/TomPelissero/status/1635404978050195458
Since CFB is trying to shorten the game, this kickoff rule would do it. College touchback rate is 50%. With all the scores, throw in a bunch of kick returns and you're cutting game time.
But it would be an additional live play and "exposure," which college is trying to lower.