I tend to think that you can't cure a problem until you think about why it arises. You often hear players and coaches using the phrase "need to slow the game down". They don't mean it in the sense of delaying the game, but to say that if a player's not careful he can get overwhelmed by the pace of the game. I recall this being said about (or by) Buxton when he was going badly, for example. All the tactics you mention are an attempt to regroup and regain one's focus - the ritual of the batter adjusting his gloves and of the pitcher turning his back to the plate for a cleansing breath are examples. The pause, charitably viewed, means that hitter and pitcher are both at the top of their game, and the battle between them is acute. Unfortunately, the tactics do indeed slow the game down for the fans too. The remedy for that is to enforce rules that take away this regrouping time for both sides. Not much is really lost, IMO, if the batter is not allowed to routinely step out and if the pitcher is required to throw another pitch within a certain number of seconds; both adversaries are relatively disadvantaged, keeping the competition fair. Other rule changes such as expecting that a pitcher coming in from the bullpen is warmed-up and ready to go would help a little too. If players are to slow the game down for themselves, it needs to be figuratively but not literally.