Explain your idea

Using the chemthrower to convert a large amount of podzol, mycelium or grass into dirt in a large area is a bit tedious currently as it only hits 1-4 blocks. Shooting point blank you hit one block, and using windage you can hit up to 4, but it's not consistent.

Either the base spread needs to work differently or there should be a way to make it hit more blocks (like a nozel that increases the spread).

Maybe if the herbicide killed the block it hits and some surrounding blocks the spread would be acceptable.

Bonus suggestion: Herbicide should "sheer" mooshrooms (without killing them or dropping mushrooms). This is a kindness to the poor infested cows that should be able to live out their lives on your converted mushroom island instead of being killed for asthetics.