Any improvements and rewards to bring this minigame back to life?

Possible game based changes:
Reduce F2P chance even lower than 12%.
If a P2P game, minimum level of at least one combat stat is 60 rather than 40.

Free Item Shop additions:
This is still limited by items that have alternative IDs
Swordfish
Sharks
Prayer potions
Blue d'hide
Red d'hide