I'm not sure i agree with your opinon on having to have prior training in grappling arts to succeed in Aikido. I had NO prior experience in grappling, just a little TKD, and i am coming along just fine. ...
But not AS fine as your own style's founder Suenaka sensei who (surprise surprise) trained extensively in other combat disciplines ;
"Roy Yukio Suenaka Sensei, founder of Wadokai Aikido™, is one of contemporary budo's most experienced practitioners and best-kept secrets. Born in Honolulu, Hawaii, Suenaka Sensei's martial instruction began under his father, Warren Kenji Suenaka, who taught his son budo basics and carefully selected his primary martial tutors. These included such legends as Okazaki-ryu Kodenkan Jiu-jitsu founder Henry Seishiro Okazaki, Kosho-ryu Kempo's legendary James Masayoshi Mitose, judoka (and later, aikidoka) Yukiso Yamamoto, and celebrated kendoka Shuji Mikami, from whom Suenaka Sensei received a nidan (2nd degree black belt).
Suenaka Sensei began his aikido study upon Koichi Tohei's 1953 visit to Hawaii, and continued his study directly under Founder Morihei Ueshiba O'Sensei at the Aikikai Hombu for eight years, beginning in 1961. That same year, Suenaka Sensei received an aikido menkyo kaiden (master-level proficiency) teaching certificate from O'Sensei, and became the first person to open a successful aikido dojo in Okinawa. He also commenced eight years of private study with renowned Matsumura Seito and Hakutsuru Shorin-ryu Karate-do Grandmaster Hohan Soken, receiving from him the rank of rokudan (6th degree black belt). In addition, Suenaka Sensei continued his judo and jiu-jitsu education at the Kodokan under famed Meijin Kazuo Ito, who personally sponsored Suenaka Sensei's promotion to sandan (3rd degree black belt) in judo and jiu-jitsu."