Immersive Cowardice

Cowardice, noun

• ¹ To act cowardly; for example by talking behind a person's back ("For 'addons breaking design choices', Immersive Cowardice does nothing else")
• ² To skip over opportunities if they would require menial, or otherwise unpleasant work; To skip over adding features with high opportunity cost;
• ³ To make addons instead of getting into internet fights on people's github about design decisions

Features:

• External Heater can heat any furnace extending AbstractFurnaceTileEntity, so Blast Furnaces and Smokers qualify.
• Arc Furnaces can automatically have electrodes inserted in a very reasonable spot.