This game has one of the best crafting systems yet to hit MMOs. Don't roll it back to the dark ages like WoW, EQ, LotRO, and every other clone out there.
As for the gathering of nodes. That is what it means to be in an MMO, if you don't like others gathering resources in your general area then go play a single player game.
As for Salvaging a Droid that someone else just killed and is still in combat, I agree that is lame. But in that case just make the corpses tagged to the group that killed them. We will then see salvaging based materials go even higher on the Market so good job there.
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One thing that could be done to help with the value of crafting skills is to make sure each one has a consumable/sell-able item.
Maybe have 2 types of item modification objects.
1 type that is a 1 time use and the second like current mods are. Not sure the solution just throwing out things. That is one of the major problems in WoW's crafting market system, so lets learn from the other games and not get Not-Invented-Here-itis.
I play many MMOs and this crafting system I think is second best or the best. The only other one that is comparable is EVE, and the long term difference is in EVE things get destroyed a lot more often so you have crafting churn and then crafting retains some of its value.