Pickaxe is 2x more effective than shovel. That means you will mine twice as fast and use 2x less phlegm. It IS worth it. Especially when you smelt a lot of iron and have to mine lots of ore and lime
Metal axe for chopping trees +(until better is released) Metal shovel for digging + destroying tree stumps/destroying things in general +(until better is released) Pickaxe for Chipping stone, Granite, Lime, Ore boulders and mining(When digging ore boulders out from the wall) +(Until better is released)