Steele is absolutely the right size to start at all of those places. He's actually the same height and about the same weight as starting LBs at Georgia and Alabama. Steele is 6'1" 232, Henry To'oto'o (Alabama) is 6'2" 225, and Jamon Dumas-Johnson (Georgia) is 6'1" 245.
Steele had an incredible year and having both starting linebackers back is great for the defense next season.