Presumably, the six new specialist shared abilities (ie. Byregot's Miracle, Innovative Touch, etc) will allow you to HQ high level recipes without the use of the old cross class abilities.
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If the new shared skills are 100% enough for a master-level crafter to HQ stuff equally as good as someone with all crafting classes at 60, then it necessarily means that the new shared skills replace all the cross-class skills.
This in turn means that every single crafter fresh at level 60 will play the same. (Basically like how it is now.) The differences only start to show once you obtain specialist status.
But then I find it hard to believe that they could differentiate 8 specialist classes enough such that they all play differently even though they all have the same base shared actions. Hmmm...
Eh, probably not. I say this because in order to actually get to that point you need to reach level 60. The scrip system, which helps you get better gear, is only available from level 56 which means you're going to need all level 50 crafts just to progress to the point where you can kiss cross-class goodbye.
Seems to me like the entire concept has a few flaws in its design.
I feel it would be the opposite.
It's perfectly viable to level only one crafting class all the way to 50. In fact most crafters in the 2.0 dash did exactly this. It would most probably be the same for the dash to 60. The only reason for needing cross-class skills was always just to reliably HQ stuff. Leves, which is the main way to level crafting, accepts NQ items too. It takes almost twice as many leves and similary almost twice as much material, but it is possible and have been done all the time in 2.0.
Once you get to 60, supposedly all those 51-59 shared skills will be enough to HQ anything up until the regular level 60 recipes. Then the "star recipes" of today would probably be the specialist recipes, and you get the specialist actions for that.
The token gear is for progression after level cap. We just get to start accumulating them earlier than battle jobs. Most likely (or rather most certainly) there will be crafting gear available to craft (and hence to trade) from 51 to 60, just like how it is now. So gear for leveling will not be a problem at all.