I personally think the new attributes that would be interesting to add are the 3 speed attributes. Newer, and even veteran members, have always thought of skating as a speed modifier. This is a mistake because it actually determines how likely a player is to hold onto the puck and skate with it rather than being hit of the puck. Having speed, acceleration and agility would finally give players the freedom to modify a player's speed and diversify player builds by a ton. Are you making a smaller playmaker? You might end up having speeds in the 90s. Are you playing as a bruising power forwards? Well, you might have lower speeds to compensate for your big body. The same would go for offensive, puck moving and defensive defensemen. I've always found it weird that we've never really had a way to determine player speed and in theory, all players are the same speed. But with new attributes, players are given more freedom in that regard.