The Lumberjack credo kind of sucks and is typically only sought after to get to Blacksmith and Strider. I was thinking that instead of rewarding just stats and wood yield that instead it could reward new recipes. For instance, imagine if instead of increased cutting speed, you got a recipe for an improved cabinet that offered 10x10 space. Or maybe a recipe for a storage item that is stationary/can't be lifted but has greater space than anything else in the game. Maybe put in a recipe for a log holder that will act as a stockpile for tree logs. You can keep the increased yield of wood cuttings but maybe combine it with the cut speed reward to make space.
All in all, I feel Lumberjack has always been one of the most lackluster of credos so why not improve it with something that everyone wants. Increased storage containers. (Or really, just give us better storage containers. Clutter creep is a real interest killer eventually.)