Ok than tell me, why its so bad to paint this Lizardman green, instead of the normal blue 6ed. GW schema.( i guess you mean the colour of the guy, because all around is nearly the same like GW schema).Why green shouldn't fit to the "concept"? lol I think you should rate the painting instead of criticize that the guy is green and not blue.
even in GW Armybooks Lizardmens are often green, especially in the 5fth edition.
The model is one of my favorites produced by games workshop. I don't believe you painted it to how it should be and i don't think you applied the concept well enough.