I was at Target Field 4/20 and didn't notice any problems as far as lines go for the men's restroom. I didn't realize until after I'd finished there was an additional set of urinals in part II of the room, but I didn't have a line to wait it in. I was in and out in and back to my seat in less than a 1/3 of an inning. Before the game might be an issue as people are slow to get to their seats.
I personally think Pete Rose should be Hall of the Fame because in my opinion the punishment doesn't fit the crime. But baseball's rules are baseball rules. Baseball is a private instituion that is allowed to set those rules.