Sorry could you clarify? If it's a combined system, do you mean you don't need to gm all those skills to get bods?
(this is my understanding based off of my memory of an IRC conversation from a couple months back... take with a grain of salt) You can collect an orange BOD every few hours, just like the other BODs. Orange bods can be bowcraft small, tinker smalls, or carpentry smalls. Large BODs may require small BODs from all 3 types. NPCs will give BODs from that vendor type (i.e., if you want bowcraft smalls, collect from NPC fletchers). Collecting from a Fletcher will count as your orange bod, though, so you will have to wait a few hours before you can collect from a tinker. Basically, you probably dont need all 3 skills on one char. Just one skill on each of 3 chars, each on a diff account. What we dont know is if one type will be less represented in the large bods or not.
I like the Detect Hidden improvement and love the achievement system. I can't wait what rogue achievements will be...