Interestingly, when Minoru Mochizuki went to France he was challenged by fencers, savate, wrestlers and boxers. He realized that Daito Ryu Aiki jujitsu was useless. So he changed to judo and kendo techniques and won easily. This is why he has added many judo and karate techniques to aikido. Upon returning to Japan he suggested to Ueshiba that he change aikido but he wasn't interested.
Yes but remember that Ueshiba himself came in contact with Daito Ryu Aiki jiujiutsu, when he challenged Takeda and was totally
dominated by him, by his Daito Ryu techniques. And before this event Ueshiba was renowned as highly skilled and unbeaten practiser of MA. I'm not sure how well Mochizuki mastered Daito Ryu compared to O-senseis Aikido, but Daito Ryu is a complete MA and probably takes even longer to master that Aikido (if that's possible).