I don't think those rules would affect whether your list is balanced or not in a significant way. Teams that have more two-way runners will benefit, but they are already intrinsically advantaged in that way.
As far as the rules go, I'm a bit iffy about the 25m goal square, but I like the other ones. I'd prefer to see the last touch out of bounds rule be limited to allow spoils from a marking contest so we don't take that role away from defenders. Perhaps just making the rule void in defensive 50 would be enough to keep it workable, i.e. last touch out of bounds is a free kick to the opposition except in the D50 arc.
As far as the rules go, I'm a bit iffy about the 25m goal square, but I like the other ones. I'd prefer to see the last touch out of bounds rule be limited to allow spoils from a marking contest so we don't take that role away from defenders. Perhaps just making the rule void in defensive 50 would be enough to keep it workable, i.e. last touch out of bounds is a free kick to the opposition except in the D50 arc.