I've been trying to avoid doing any of the side stuff, unless it's directly in my path - while still aiming to get 100% - and I gotta say, for the most part, it's such a better experience. It's difficult for me to not go out of my way to do everything but it provides much, much better balance and pacing. Though I've noticed an issue. In a very similar game, Batman: Arkham Knight, I'm always doing something. Here, there's some streches where I'm traveling between story missions doing nothing, despite there being things to do. I realized what it was today - the damn towers. Such a stupid design decision, because every side activily is slowly unlocked through the course of the story by completing main or side missions, which is brilliant design that means it's always leaving you something to do as you go. The towers Absolutely ruin this, blocking you from accessing these things without going out of your way. Sure, they're quick you don't have to climb like a Ubisoft game or something, but they are pointless here and a really dumb distraction. Every other type of side activity is a an exercise in the games core mechanics, except this, it's nothing.