Change default for mob-head-removal on head exchange to true, so you can actually still use it later in the game.
Add support for dense ores
Change default flint-recipe to 3 gravel since there are mods out there with 2x2 gravel recipies (extra utilities)
Change xp-formula from "Base + MiningSpeed/2" to "base + UnmodifiedMingingSpeed + BonusMiningspeed*1/5"
Fix buckets not being destroyed when placing hot liquid in a tank.  Clay buckets cannot pick up liquids from tanks, because Forge is unable to recognize it as a bucket...
While I'm at it, change picking up liquids with clay buckets to correctly update the block
Turn crafting-grid-repairing on by default, because earlygame can be quite obnoxious without it.