I don't know why I kepp posting my opinion if it is never usefull and no rioters read them, but I think this early concept has a style hair that fits better in his thematic. Reflects that he is an experienced man but not too old to not be able to fight in the frontline.
Besides, it gives him a unique image and style (not just long white hair as every wizard (Lucius Malfoy, Merlin, Dumbledore, etc).
Note: At least, if you don't make this change, fit the grey color in game to his splashart (where he is blonde). Although he has differents clothes too so maybe you don't mind details.