Frankly, I like that not every Summon is Decode Talker, Yuma had a hardon for Utopia, and that got boring quick.
I think there is a balance to strike here. A character overusing a card for every situation despite having other tools is bad, but Summoning everything just once and moving on is too.
Yusaku has a ton of one-shots although Code Talkers and Firewall are cool. Link Spider probably being the only Link 2 or lower he's Summoned more than once.... Though I'm like 8 episodes behind so I'd like to be pleasantly surprised.