How about something along the lines of:
This is a great English prospect, that has been trained beautifully in inside skills. However - if you want this player to make the NT level, he will need some HA and PA training.
That would sound better.
I hardly know anyone that writes posts on forums like that... Forum posts generally are short and to the point.
First off all I am very direct, this is how the dutch society is. Sorry for that.
Secondly English isnt my first language.
Thirdly I am not a bad person that wants to be condescending or rude or whatever.
If you know all three points, and if you see the glass as half full. Than you can respond differently to my post as well...