A Vulcanus overhaul that makes dealing with hot & molten metals a true challenge.
Mods introducing new content into the game.
Augmented or new ways of transporting materials - belts, inserters, pipes!
Things related to oil and other fluids.
Furnaces, assembling machines, production chains.
The new tungsten plate and a lot of the new petrochemistry recipe's do not accept productivity or in the case of the tungsten plate just ignore it (at least for its furnace recipe).
Should be fixed in the most recent update :)