Hi there, long time toolbox player here, been loving the changes to structures so far (fire pit, new wall and bigger spikes).
If there is one thing I would change it's the Blacksmith Hammer and Smith.
Blacksmith Hammer costs too much and takes up one loadout slot. For fast repairs it's better to take the Heavy Handaxe as it is safer, has better reach and nearly the same repair speed and for some off action repairs Mallet does the job. The Blacksmith Hammer should be merged with the Warhammer or then the cost reduced to 2 points so that it is just a straight upgrade to the Mallet taking twice it's point cost.
The Smith perk is absolutely useless for anything else than trolling. If one would increase the repair effectiveness more it would just make some random structure stalemates even more stale so I don't think that's the way to go. I would change Smith so that it allows you to break down weapons on the ground with a repair strike for 2 supplies. This ...