Blizzard's 5.4.7 PTR Patch has been datamined by Wowhead, and there are 2 interesting strings in there that could have an effect on our professions:
- CHARACTER_UPGRADE_PROFESSION_BOOST:: |cff00ff00Veteran Bonus:|r |cffffffffLevel 60+ characters will also receive a skill level boost to their primary professions.|r
- CHARACTER_UPGRADE_PROFESSION_BOOST_RESULT_FORMAT:: |cff00ff00Bonus: %s (600)|r
Now, from what I can see here, it seems as though the "current" system in place is that you will be able to get a skill level boost to primary professions only if you are at least level 60 on the toon you're boosting. Some interesting info, I'm sure we'll be seeing more as the PTR is tested, and I'd love to know how much the boost will actually be. Very interesting news today, it will be fun to see how this pans out!