I'm just learning myself but I'll give it a go.
What I see if that he appears to toe out slightly in the front? May just be how he was standing.
His whithers look a little high, and his back a little long.
His hinquarters don't look very powerful to me, would like to see some more roundness.
Should looks good. Could use some neck muscle but it ties in alright there.
Would love to hear what someone else has to say too. xD
Pssh.I didn't pick up the wrong lead
It's called a counter canter...
...A very advanced maneuver.