I think I might have a solution for Trinity
Okay.
Here goes.
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+ 
Grants 30 AD, 30% attack speed, 30 OnHit physical damage, and 30 (10 on DoT) OnSpell physical damage. And of course some HP/MP. Hitting an enemy champion with the Spellblade proc now grants kill-level move speed to make up for the loss of Zeal's movement speed.
With the exception of Pirate and Samurai Bob, I'm pretty sure this would be more attractive to every single other champion who likes building Trinity than the upped crit chance. By giving it some OnSpell damage in addition to the OnHit, it becomes much more widely attractive to champions who like weaving spells between their basic attacks.
Thoughts on the concept?
If bad, why? If good, why? If walrus, walrus?