Essentially yes. They aren't even going after a charge of child abuse, because they know it's dead in the water. Reckless injury will be difficult because it conflates with the lawful allowance of corporal punishment in the state of Texas. Because of this, and by proving that the child understood why he was punished, proving the injury risks the life or well being of the child is next to impossible.
Long story short, I can easily see a plea down to a Class A misdemeanor charge of parental neglect.
Some people might go nuts at this, but frankly, the case is in Texas. The initial dismissal and reasoning behind it of the first grand jury on the indictment will also be a huge roadblock for any prosecution.