Feature:
In Create 0.6, mechanical drills were updated to not actually break cobblestone blocks that are being generated by water and lava, instead dropping the items into an inventory below. It would help to reduce lag if a mixin was added to extend this functionality to the andesite, diorite, etc. generators that Spelunkery creates.

Additional info:
The mechanical drill still plays the block breaking animation, but when the animation finishes, instead of breaking the block, if there is a belt/chute/hopper below, the drill just pushes the block into that inventory instead of breaking it.