Phil is on time for where he is at his age and where he is trying to be in the future.
The Future is not now, he knows it and will pace himself accordingly.
He is trying to improve slowly, let his muscle maturity run it's course by doing so, in
3 to 4 years he will be sitting pretty provided he does not get caught up with the almighty Scale, which has ruined it's share of potential great athletes.
Size is not going to be his problem down the road, Balance will become more important when you get right down to it.
He needs to focus on his weaknesses, sans the extra mass and the rest will take care of it's self.
Circa 1993 Flex Wheeler at the ASC never looked better and he was 216-218lbs at 5'10. His conditioning was sick and separation was rivaled by none!
This will be Heath's Ace in the Hole, as the majority of Pro's on the circuit today, sacrifice Conditioning for Mass.
This will separate him from the pack "Conditioning" and the cream will rise to the top.
Phil is handling his business at a young age being compared to guys with 5 to 10 yrs of more training is not really fair but he is ahead of most of them at this point of his career with time on his side.
ASC Top 5 Finalist, Mr. O qualification and possible top 6 finish in 07'.

Peace,
S. Ray