What's happening is that they're becoming support. A lot of folks think that "support" means "Lesser" "secondary" or "not important".
The root problem with a lot of DoL and DoH jobs was that they weren't being used optimally because they were treated as ends themselves and not a means to the end as what they should have been. Eoreza is facing a threat that will need to be met with the strongest weapons and defended against with the best gear. But this was being thwarted by a long list of parts, dyes, glues, etc that made crafters focus on only making high rank gear and trying to HQ it. The result was a lack of gears for people at lower ranks because it just wasn't worth it. It actually led to fewer real crafters. There are lots of high rank crafters who don't make anything because they're only high rank for their own repairs.
The crafting system was defeating the purpose of crafting. The new system focusses on making things, simplified recipes are conducive to creation, not grinding sp. The new repair system will move people away from grinding just so they can fix their gear to 100% which will give lower rank crafting of gear a chance to shine. (I went through about 20 ranks of grinding crafts, ranks 15-35, without making a single item of gear.). Add to that materia...
Regarding DoL: There were few items that were actually desireable. This items were used primarily in grinding. Everything else was NPC food. The result was a shortage of items used in crafting parts for gears. It also made DoL extremely boring. Why would anyone want to travel the world gathering different things, when they're only going to need a few things (Iron, Silver, Gold sand, and maybe pyrite, were the only things worth mining.) Now with the new system, even high rank DoLs will gather dyes for colors and they have to travel all around the world to do it. What's best, a lot of the things they gathered was dropped from mobs, further marginalizing the class. These items will no longer be dropped, meaning that DoL will be more important now. High ranking DoL will have access now to exclusive grade five mats as well. Add to that Catalysts for Materia...
These are solid well thought out changes. Thumbs up for all who made this possible.