Nidbanes were never good they were either useless or too powerful in groups and have always been very low effort to create. Also you are saying you like nidbanes? Because I’m pretty sure most pvp players view them as entirely unnecessary.
Your tar is not going up in value because a dock can be broken, tar is so easy to make that I’m surprised low quality tar would have much trade value at all considering I am just one guy and I produce more tar than I’ll ever be able to use on my own. If you want to sell some decent tools for tar or tarsticks that’s great for you but that doesn’t mean anyone has actually been selling tarsticks to you in large amounts. Maybe a hermit trades tarsticks for his first tool upgrade but after that the tools you’re selling for those are subpar compared to what metal already goes up to now.
You said yourself that no one is really smashing docks so would that not need to happen first for a product to increase in value and necessity and then it would be worth more? Right now you’re just selling tools for tarsticks because... Well I don’t know why you would I guess maybe you picked something easy to make that newbies can afford which is nice but it has nothing to do with docks.
Seriously dude if you’re so interested in creating political reasons for resource drain then think of something better that could be interesting for all parties involved and suggest it but don’t argue with me about the merits of knocking down someone else’s sandcastle because you can as there aren’t any and mechanics that encourage behaviour like that only cause players to quit the game which I assure you hurts the economy way more than the amount you think you’re helping.