For pumpkins/melons a single MFFS forcefield projector can harvest entire rows at a time. Project settings: Wall mode, strength upgrades = length of the row, and a force matrix to left/right to harvest 2 rows at time (assume melon/pumpkin on 2 outer rows and harvestables on 2 inner rows). A chest next to the projecter will let you keep what the block breaker destroys.
Doesn't work well with tilled farmables as the forcefield reverts tilled land back to dirt.
Probably be good for mushroom farms as well. If anyone farms those. They work in a bio-reactor, so might be worth it for 2 unique types