I kind of like the overall idea of them, kind of unpredictable yet effective sometimes, but this same randomness can also render them completely useless. Joy’s friend campaign really highlights how bad it is that the traps never disappears and he’s stuck only having his basic attack and no way to push the enemies back onto the traps to allow him to use his skateboard skill again.
I think a simple change would be to make a 3 traps disappear when his cool down is up and allow him to start his skill again to toss out 3 more. Sometimes, the traps are too far back to even affect the tanks that his disk specializes in, so another proposed change would be to make them toss at least one trap in the front of the enemy side every time, to make sure that at least one goes off to re-trigger the skill. Their skateboard skill could also have increased knock back to tanks to help trigger traps or the trap placements could vary based on the remaining enemies to make them drop closer to the action of backline is gone, plenty of options that could help him to not be so crippled due to rotten RNG.