Are the radical changes planned in cricket good for the game??

Think 50 overs should stay. 50 overs are more of a competition between bat and ball. 20/20 is quick but scoring 10 runs an over can be quite irritating to watch. Both can exist, purists have Tests and 5 overs, Others will watch only 50 overs and others tests and the 20/20 for spreading the game and keeping it modern