Bri-Thai:
I just read your post, and wanted to respond. I don't think that you really understand the differences between the aims of BJJ and Judo.
They never leg tackle, and only lock on the elbow. This inability to attack and defend from so many other positions (i.e. neck cranks, heel holds, leg locks etc) has meant that it is nowhere as complete as BJJ.
We do have some leg takedowns, like the Kani Basami, but they are illegal for tournement play. I've read that the reason for this dates back to the tournements of a hundred years ago (estimate). Back then, rival dojos were using the Kani Basami to injure the knees of their competitors. That is why it became illegal.
You also claim that Judo is not as complete as BJJ. This statement is, at least in my opinion, very incorrect. It's true that we do not spend as much time working on ground fighting, but that is not the strategy. The predominant idea behind judo is the use of a controlled throw to end up in a dominant position over Uke. This position could easily end up in a pin, armbar, or choke. With this strategy, there isn't a whole lot of reason to spend alot of time on the ground. Therefor, we makeup for our (relatively) less effective ground technique with our very strong upright vocabulary.
BJJ is more about overpowering uke on the ground through superior technique. Neither strategy is better or worse, and both arts are developed with these ideas in hand.
To put it another way, you wouldn't lable Kung Fu (sorry, CMAers, I know it's terribly generalistic) more limited than TKD just because they don't deal with high kicks quite as much. It all comes down to the difference in strategy, and that is what makes the martial arts so wonderfully diverse.
Also it has been free of the Japanese' habit of being unwilling to change, as they seem to respect what is old to the detriment of what is best.
I don't understand why people think that we should change our strategy just because a different player came to town. Our strategy works for us, and we don't feel that we have to change it. Secondly, you talk about the "Japanese unwillingness to change." Sorry to burst your bubble, but the Japanese have always embraced change, and do it very well. For just one example of this, look at the Meiji resturation. Another one is the post war miracle. Now, there are some cultural aspects that do not change, but that's the same with all cultures around the world.
Lastly, you said that if there was a BJJ studio nearby, your children would go there. I mean no disrespect to you, and I may just be misreading your post, but maybe you should let your children decide what martial arts they should and should not partake in.