One very small, probably insignificant thing bugged me about the article: The author always capitalized Daito Ryu Aikijujitsu, with capital D, capital R, and capital A. The only time he capitilized "Aikido" was at the begining of a sentance. A subtle indicator as to the author's opinion of the two arts? (probably not)
As to the actual content of the article, I think it has quite a bit of merit. Looking at the roots of Aikido, martial or spiritual can be nothing but a good thing(tm). Keeping in mind that O Sensei transformed the old into somthing new.