I think instead of nerfing the Hammer, they should make structure a part of the process. Meaning, the better the tool you use the stronger the block actually is.
Ex. when upgrading to concrete
* Stone axe - 4 hits 2,000 hp
* Wrench - 3 hits 2,500 hp
* Hammer - 2 hits 3,000 hp
* Nailgun - 1...