First and foremost your wedges seldom replace anything but obsolete low irons (like the three iron; which is not an option in this game [meaning that you can't substitute a wedge for a 3 iron in your bag]). I say that because you can only have so many clubs in your bag in official tournament play and/or ranked rounds (IRL). Most masters on here disable their hybrid to add an extra extended wedge (GW, SW, LW). It's the only option unless you want to disable your 3w as well for another wedge.
Most upgraded wedges only replace inferior wedges. Why? For spin, distance, trajectory, and accuracy. Oh and for a greater range of punch shots (which isn't realistic but apparently beneficial in the game).
The upgraded wedges have an increased swing meter. What you desire isn't virtually possible. There are no upgraded wedges that incorporate a slower swing meter. However you could always upgrade your wedges and but some GI3 balls.