1. The Luminary Tools only exist to keep the people happy from 1.0 that ended up getting one.
2. There's no difference because they only exist in the first place to keep DoL/DoH on equal footing with DoM/DoW in terms of "Relic weapons".
3. The Achievement ones are something, as stated by SE you'll eventually unlock just crafting normally (1.0 era) but as we know people decided they had to "grind for it", which is partly true since they were released after most people botted leveled crafts in 1.0, but newer players were obtaining them by simply crafting gear throughout their career.

Overall, Yoshi said this game was going to be easier and more accessible, so handing out 1.0 items essentially is part of that accessibility change.