I think its a great idea, and I think they should raise that cap, but... I don't think they should raise it even .1 higher than you could possibly use as a sub-craft, and the reason for that is quite simply there are too many freebies in this game as it is, crafting should take time and gil to level as the rewards for high level synths can earn you multiple 10's of millions of gil, and if they gave an easy path like this to cap, the value of the high level synths would drop to nothing, and what would be the point?