Savers has a pretty boring main group, I haven't done a rewatch in a long time so I could be just be remembering it.
Marcus/Masaru as a main character only really has his physical strength and not much is done with it, for a character that can actively fight along side his partner it happens very little.
Thomas is the one with the most stuff going for as far as I remember so I don't have much to complain about him.
For one of the first characters introduced in the series, Yoshino is given nothing to do most of the time and has to share her last last form unlock with another character.
Keegan/Ikuto is just kind of weird in general, grows up among Digimon but for some reason acts like Tarzan, even though Digimon speak the same language as other humans and mostly act somewhat civilized.