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Lots of interesting stuff. One example:
"If you are leveling a new armor or weapon skill line, will you take more (or do less) damage?"
"No, trying out something new won’t put you at a disadvantage. You can attack and defend normally, just like with the weapons or armor you were using before. You’ll still want to unlock the active and passive abilities in that new skill line, though, so it will take some time before you have access to all the benefits."