How were they unbalanced if I may ask? They seemed balanced in my opinion, they gave the same coins/experience rate as zombies except that it was a bit faster. In the end it just depends on potions and Giants, so I don't really see the point in changing the price this much. It's also stupid how the Cave Spiders are less expensive than the normal spiders now even though the Cave Spiders seem way more overpowered..It's not a bug, spiders had to be balanced.
It isn't; https://www.cubecraft.net/threads/true-challenge-not-impossible.97084/There also is no point in having the True Challenge achievement as it is impossible to achieve.
lol I've completed it with /share, but I'm not really sure if they just missed out that way to complete it or something, as that isn't really a 'true challenge' either, it's just /share in another way... They will probably change that way of completing it as well I'm guessing, if they already found the spiders too overpowered.. Good find though, didn't see that thread. :p