HW, I see you've posted the same topic here as the one at ON. But permit me to add what I posted on your thread at ON to the one here. I'd like to see what other people on this forum think.
Given that Kyokugen has a gained variety since it's been refined upon by Ryo, Robert, and Yuri. The fundamentals, of course, were courtesy of Takuma. So I don't mind the fact that their individual styles vary from each other yet retain the basics that Kyokugen has always had.
But I wouldn't say that Shotokan hasn't gained any variation ever since it's creation. There may be disagreement with this but allow me to continue; let's go back to what we know about Shotokan history (SF storyline). It's commonly known that Gouken and Gouki were both instructed in the original art of Shotokan by Master Goutetsu. What they were taught was meant to kill their opponents. While Gouki embraced the killing arts, Gouken on the other hand followed a different path. Although Gouken didn't use his skills to kill, he retained what he learned and resisted the urge to incorporate murderous intent with his technique. Gouken taught as much to his two students, namely Ryu and Ken, the non-killing style that he used. After Goutetsu and Gouken's death at the hands of Gouki, we now have Ryu and Ken as the successors to the Shotokan arts. It would be safe to assume that Ryu may be considered as the basis for the fundamentals of the original Shotokan arts since what we know of his technique is purely a refinement of the basics: Hadouken, Shoryuken, Tatsumaki, etc. Ken, as all of you already know, incorporated his own variations into his technique and developed his own type of Shotokan karate. Hence we see moves like his Shinryuken and Shippuu Jinrai Kyaku... not to mention his arsenal of kicks. Akuma, of course, is the current master of the killing arts of Shotokan karate; I may even go as far to say that he and Ryu represent both the Good and Dark sides of Shotokan karate. Then finally, we have Sean and Sakura. Both have incorporated their own preferences into the basic Shotokan technique yet retaining the fundamentals... Sean, as instructed by Ken. Sakura? I don't know if she was actually under Ryu's instruction although I know that he was a major influence.
To end my lengthy discourse, I would like to point out that having fewer techniques or having fewer variations don't necessarily mean that an art is better than another. The same goes for the opposite. To quote what I read somewhere, "Purity of style is just as important as variety of style...".
Whew!