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I'd get a catch can as soon as possible. All that oily gunk building up in the intake tract and on the back of the intake valves for 29K miles can't be a good thing for the engine. I read that it also reduces the available octane levels over time as it builds up.
Getting a tune would be the next logical step, but you will lose your powertrain warranty in doing so. Our engines don't get to full throttle until 4K+ rpms from what I hear. It's built into the drive by wire system. And, as far as I know, no one has been able to defeat it even if you have a aftermarket tune. That has to be worth at least a few tenths right there.
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