I think Ball of Spiders would be playable if the webspinners had Charge. Even then, it'd be pretty slow, but at least you'd impact the board and be able to play the beasts that turn and/or the next. It'd be trading pretty terrible board impact for card advantage.
I also think people are overestimating the power of Lock and Load. To be even close to a good as an Arcane Intellect, you need to draw two cards. So you need to use two spells that turn, on top of the Lock and Load itself. That's not only pretty slow, but it assumes a Hunter will have that many spells in hand by turn, what, 5? At the minimum? And that the spells would be the most effective thing to do that turn.
Plus, the cards are random, so unlike Arcane Intellect, they won't necessarily fit into your deck/gameplan smoothly, and may actually just suck. Sure, it has the potential to ball out of control and win games, but so do a lot of cards that aren't used because they're both too slow and inconsistent -- a problem I think Lock and Load may have.
However, if it is still pretty powerful, I think it'll be a good thing, as it will encourage Hunters to play a slower game. God knows I'm sick of Face Hunters!