As the show was essentially a big commercial for the card game, the filler allowed for new cards to be showcased without having to clumsily introduce them as part of the original plot.
Counselor Lily Is Counselor Lily a good nurse, or a naughty nurse? Nekogal 1 I mean really, Konami? He used a deck based around Insect-type monsters.
In some cases, the death will be toned down as much as possible.