The only way to make proffs relevant is to give them great rewards. Rewards that should require work to obtain. Rewards that will be popular in demand. Meaning, its going to be a cryfest when certain items will be "unbalanced" compared to the rest.
Wow has been a victim of a neverending cryfest about balancing out everything to the point were everything plays, looks and feels the same. Proffessions were badly affected by it to the point they have been worthless for years.
Imagine if BS crafters gets items that are BIS and soulbound. let the cryfest begin.