I found an exploit. Electrolyzer recipe: 6 buckets of water + 3000 EU -> 4 buckets of hydrogen. (Too cheap in EU)
Also, lava centrifugation. Previously it was 8 lava buckets for 2 copper ingots, 1 tin ingot, 4 electrum nuggets and 1 tiny dust of tungsten. So 72 lava for full tungsten dust.
Now it's just a 1.25% chance to get 1 tiny dust of tungsten dust from 1 bucket of lava, what equals 720 buckets of lava for full tungsten dust. Similar with other metals (copper, tin, gold, silver; tantalum is new).
Is this nerf intentional?