Neonchameleon
Legend
If that's the point then it's a pretty useless point. How they fight when they can think of nothing better to do? What's the matter with just trying to injure their opponent? That's been the default since the very beginning. Your insistence on having a power to allow you to bash someone back with a shield isn't looking for a default action when they can't think of anything better to do, it's an attempt to achieve a specific effect that isn't simply injuring your opponent on the battlefield.
It's my attempt to have a default option to model a specific style of behaviour in a fight - large and in your face and driving you backwards. Not something that you always have time to think about, more a reflection of who you are.
And if that's something that should be there by default, why not disarm or any other effect I want to achieve?
As far as I know, no one reflexively disarms people. Knocking them prone on the other hand - monks have an at will to do this.
Ad hoc rulings were required for anything else. That hasn't changed. To assert that one game is somehow more limiting than the other in this regard is really more of a will to feel that one is more limiting.
But this isn't ad hoc behaviour. It's how I fight with sword and shield without thinking about it. That I need to be sixth level in Pathfinder to model my combat behaviour is ... a pity.
I think you have caught yourself out here. Firstly, you have your 4e defender shields upped to 75% power and secondly, as soon as you see MTG and 4e mentioned in the same sentence, you think that the comments are automatically bad.
You're probably right

Tide of Iron is a cool ability so I can understand where you are coming from. When starting adjacent, Bull Rush forces you to give up the attack (which you will get back with an attack of opportunity when they try to get up from prone -as will others who are adjacent). I suppose a Bull Rush like this would represent focusing your attention on shoving them back. However, you can charge them, still get the attack and the push effect knocking them over and the ensuing attack of opportunities which is not quite as you describe but in effect is similar (and perhsps a litlle better).
Bull rush doesn't knock people prone in 3.5 (I don't think charging helps this). And giving up the attack is really not what I'm looking for.
If I was your DM, and your fighter had multiple attacks,
I.e. 6th level?
In the Pathfinder Core Rules, you can choose the Shield Slam feat
IIRC that requires you to be 6th level.
Both these solutions require an olympic athlete level of physical prowess to mimic the way I fight personally with sword and board - and I'm neither 6th level nor any sort of fighter or warrior.