"They did." Ken considers how to approach this, next. Takato doesn't have the issue Ken ran into, after all - his Digimon can, presumably, evolve fully. Ken might have backslid a little into focusing on things he couldn't do, when he knows how much assistance Imperialdramon could have provided.

Why would he be summoned to help people without Daisuke?

More importantly, what things can only he do that he can contribute to the train?

"It's different," he admits. "Being part of a larger team."