[Rendar]

Could have a trait that's the exact opposite, if you really wanted. Instead of a sensory trait, make it a flex trait. A trait that makes YOUR focus reserves show in relation to others when they examine you, or mouse over you, or something. That way if you ARE a really powerful mage that wants to show that off, you can. Or if you're really meek / have no focus pool but want to show off that you don't need focus, you can take it. Though with this variant I'd say don't have any requirements on the trait.

I actually really like this. It's a complete flex trait, rather than a "I'm going to get metagamed" trait.