I just tried creating a Projectile/Aoe/Pierce/Pierce(Shape) + Dig (Components) Spell in 1.10.2 (Creative Mode),
I thought it would dig a 3*3*5 block, but it digged a 3*3*1 plus a 1*1*5 in the middle.
Since I have no advanced world at the moment, I can't check if this were due to creating the spell in creative or if the spell grammar changed.
Anyone got a clue what might have gone wrong here ?
I also tested Projectile/Pierce/Pierce/AoE + Dig , Projectile + Aoe / Pierce / Pierce / Dig and Projectile + Pierce /Pierce / AoE / Dig.
None of those worked like I would have expected ( digging a 3*3*5 block)