UA is an heavily flawed concept. It is inconsistent with reality, and any FE explanation is simply inadequate. Your explanation for meteor strikes is that 'they have not been accelerating for as long as the earth'. The thing is, while it may not have existed (hence been accelerating for the same amount of time) as a meteor for as long as the earth has existed, what it was formed from has (considering that matter does not have a habit of popping out of nowhere). Thus, that matter has been accelerating for as long as the earth. The same holds true for an object like a ball. It is accelerating upwards with the earth, and has been for as long as the earth has existed. Thus, the UA is disproven.