I'd have to fly with you to answer honestly. One of the most glaring deficiencies of trike pilots is poor directional control with rudder. On landing, take off, cruise, turns, straight, and inverted(kidding).
If the CFI said it, that pretty much tells me he knows your limitations and keeps you in check from having to asplain why the little airplane is in the grass with the prop all bent up.
To take another tack at it, go back to him and ask; 'what do you want me to demo to remove this limitation'? If you have done 54 landings, all with the wind almost direct down the runway, then you haven't experienced even 1 knot of x-wind. Your post is vague on whether the '7-10kts' or higher was x-wind component, or just the prevailing wind(aligned with runway). Sustained x-wind requires control manipulation that is just a bit different, and if you haven't done it, you will need practice. If that was the x-wind component, I'm guessing the CFI found your technique less than stellar.
