A while back new spawn eggs were added to the gemshop. As some people have their bases in new world they place spawners in there, but then later may need to move them. There are currently a few new world spawner pickaxes, but none for these newer spawn eggs. Just might be good to add pickaxes for them so people don't have to buy a second spawner rather than just moving their first. The new gemshop eggs are: Rabbit Horse Wolf Squid Ocelot Bat Villager Which i definitely feel like there should be pickaxes for. There are also much rarer eggs from the vote crates which you could add spawner pickaxes for, but I do not feel like they are as essential as the gemshop ones
Another possible option that was discussed amongst staff is a 'general purpose' pick that will mine all [or a group] of spawners rather then just one, for convenience sake. Great suggestion, thank you!