Well, much of the overall quality of modern aikido has its origins and causes in not adressing this kind of issues.
I disagree. I think it's totally possible to say "X kind of training would improve your aikido" without picking over a hundred years of the history of X training and who did or didn't previously have it. I think it's totally possible to say "modern aikido could be improved" without diving into the political tradeoffs that led to it being the way it is. Especially for those of us who are not Japanese and were not even involved in the art (or, for that matter, born) when some of the key events took place.