I would agree with you whole heartily if these skills were in great demand or in demand at all.

Carpentry and lumberjack are pretty much useless now. No one uses straight out wood weapons, if they use a staff its a metal shod staff and the metal that is being forged is what matters not the wood. People don't use clubs and bokkens because they wear down way too fast for the cost of repairing. Plus now that you can buy boards in the tinker guild merchant, don't really need lumberjack.

Now I will say this, I think for the few that actually use these skills they should be redone, but if redone I would like to see that the wood has an effect in the weapons made, not just the metal.

Now as far as skin corpse and leather craft goes. Skin corpse really needs to be redone for the fact that you could have 100% skill and not get a skin in 20 attempts, whats the point. And as far as leather craft goes, there is no point in changing it if for the only fact that changes with the skill is the time taken to make something.