I'm really struggling to see what utility you're talking about here. Do you just want a Passage of Arms clone? There are so many other places where WAR surpasses PLD in utility, such as mobility and knockback negation, and raid damage utility in the slashing debuff. Also, why compare just PLD and WAR? If utility should come at the cost of dps, then WAR should be behind both DRK and PLD in dps. Versatility is enough of a strength on its own.

It's odd that anyone would try to argue that SiO is weaker than DV. SiO doesn't require a proc. It applies to yourself. It has a 25% shorter recast. In magic heavy fights, you can consistently burn RI on it so that it is always more powerful than DV. It can take advantage of WAR's unique HP advantages from both Defiance and ToB. And if you really, really want to, you can make it more powerful than a Tank Limit Break 1.

To be honest, if you're finding that you're being outperformed on dps by your co-tank while playing WAR, it's entirely on you. As it was in Heavensward.