What you really mean to say in order to be correct is "I frankly think Aikido would be a lot better if it used internal strength, but the syllabus simply doesn't seem to be there." Think about that for a second.... Koichi Tohei's Ki-Society does just that, whether we cavil about his methodology or not.
No, I meant what I said. I think good aikido depends so heavily on having good internal skills, that it's a shame that it's not structured as an internal art, meaning one that works first to develop internal skills and then progresses to how to apply those same skills.
I'll respectfully disagree about the ki society. I think that if you have some internal skills, their tests confirm that, but I think they don't really work well to develop these skills from nothing. They do not teach you how to be, they might give you some feedback in your explorations, but they don't teach this the way that I have felt from the very little amount of internal training that I have done.