*snort* I could just as easily say that Shioda looks like a pre-war mostly Daito-ryu Ueshiba with his own sense of gamesmanship that might have thrown a nod here and there to the style "ancestor/cousins" he let use his dojo :P
I see your *snort* and raise you one *hmph*. Yeah, sure that's possible too. But also conjecture. I could retort that the pre-war guys who left Ueshiba to found their own schools, of whom Shioda was one, reputedly did so because they weren't "getting the goods" to the degree they knew Ueshiba had. I doubt very much that Shioda had the "peng" with which to drive aiki-sage (which he really seemed to like. A lot.) and aiki-age. If he'd had it, so would Tohei and the rest, and it would have informed their styles of aikido when they founded their schools.
Without the aiki, Shioda would not have had the knowledge nor the body wisdom to manipulate his scapulas with his famous "Attack my chest" aiki-sage move. Nor would he have had the sophistication of movement in his meimon and tandan in aiki-age. Those actions are parts of a very specific Daito-ryu-with-aiki training and would not have been gained casually through occasional "exchange" with those "ancestor/cousins" visiting his dojo. He had to have been trained by someone. I doubt very seriously that it was Ueshiba. The circumstantial evidence of Kodokai "trademark" techniques points the finger naturally toward Horikawa or one of his senior students, over a period of time and not casually.