I think most players would like more full stroke courses, and yes I agree variety is good.
But a couple of points - WGT needs long courses - players stats of fairways hit, GIR etc means that unless the course is very tough and long, it will be too easy for this game.
But in fairness we do have quite a good selection of courses, and looking through your score history you mainly play a couple of courses, thus depriving yourself of the variation you want.
The cost of putting a course together for WGT is expensive, and to recoup that investment players will need to play those courses (ball use = green fee) and playing a local municipal course will probably not achieve this.
I would love to see more courses, but unless it is viable, I cannot see lesser known courses being included - unless the course is willing to front up with the cash.