Or they can make a talent that changes how a shielded fighter dishes out attacks of opportunity:
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Talent: Shield Bash (requires shield)
When an enemy triggers an attack of opportunity from the character he receives a shield bash that does physical damage (based on weapon strength). If the enemy has no physical armor at the end of the attack he is knocked down for one turn.
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So basically what this does is promoting good positioning of your front line shielded fighter. If he is placed at a good choke point and your enemies are decently whittled down he should become an absolute menace by tying down a significant amount of your foes for free. If he's placed poorly or your enemies haven't received much of a scratch then they can pretty much just run through him fine. This should also be more well suited for a PVP scenario because no one loses complete control of their characters and can counter with ease (fortify etc).
