There is almost no penalty for teams kicking touchbacks. If they really wanted to prevent touchbacks they either needed to move the kickoff back to the 20 like it used to be or up the penalty so it would be teams starting at the 35 or 40 instead of the 30. There is virtually no reason for a team to not kick the ball thru the endzone right now, especially since they have no idea how kick coverage will be on these plays over a large sample size during the season. An extra 5 yards, wow...big deal.
The NFL made all these changes but were almost pointless due to not really penalizing the team for TBs or moving the ball father back on kickoff so that a TB would be much harder, which IMO is exactly what they wanted...give the "illusion" they were bringing kickoffs back into play but leave it so that kicking a TB is still going to be far and away the most likely outcome.
Which is no surprise since that's what they do with lots of things...give the illusion they care for public image, but really don't...player safety, retired players, concussions, field playing surfaces, etc...