Not th GM here but if your asking for opinions...

I think you should make your power more literal.

So, you can't draw telepathy so you can't create it.

You can't give your character. A power he does not already have like telepathy or empathy.

You can't draw something that grows bigger. So you have to draw to scale, and if you want to make something bigger and more complex it takes significant my more time and resources.

Time should be a factor to the creations strength. A quick sketck should not function as well as a oil painting that room hours.

Also, how much control do you have over your creations? It might make him have to be wise before create ing something animate.

Also keep in mind that the gm has already said we woukd 'level up' so don't feel like the power needs to be ' perfect'

That's how I would take it on, anyhow.