That's probably because he wasn't fully done at that time. Since Roy's used model changers for his, I'm sure Chrom does too. Maybe they didn't finish that coding. Needed to ruin the magic. :v
For his Idle, you should make his upper body lean back a bit more. He doesn't bend that far forward. Needs to be enough to where his head is angled straight forward or close to it, instead of pointing downward.
You got the bone animations for all of it? God damn it... wish I had that when making him. Might as well not even release mine. Been sitting on it for over a year.