Karko, I disagree that gem items are relegated to fringe usage. I will grant that they’re expensive and it might be nice to see them have a higher durability for their cost, but even as is, if you’re properly set up for harvesting, you get at least 3 to 4 times the value out of a gem tool that you spend to get it, and it gives you by far the most efficient time usage. (Without any special buffs)
Using lower level tools is going to slow you way down and it really doesn’t pay for itself, because you’re spending so much more time harvesting the same amount of material.
I do agree that the effort/reward threshold needs some work overall.
Also, My two cents on the power coils/spark: I enjoy having to have both, and I think needing to increase your build space as you go is reasonable. It fits the game perfectly, IMO.