MLB is addressing a problem that does not exist. There were 185 EI games in 2016. 4.5% lasted past the 15th inning. That's 8 games. 67% of the games were over by the 11th inning. So some 30% went ended between the 12th and 14 inning. If pitchers were not used like Kleenexs, teams would not run out of them in extra innings.
It's not going to be implemented by MLB. Commish said so..