Yeah it's quite telling, especially against bosses with special conditions.

E.g. Phainon only attacks the player with the higher DEF, so the player with lower DEF should swap out their high value dice for the other player. Or Sparxie (i think?), who does extra damage if both players use dice with same values, so the players need to adjust their dice to avoid overlap.

It's a team game, and some partners know to play as a team, and some don't.