On a relatively new character, while still below level 10 on all my crafting classes, I was able to use a fair amount of what I had saved up before the patch to craft a full set of equipment for my level 13 GLA. What materials I didn't have I could just go and buy from an NPC, or use the required crafts to procure it. Each piece of equipment required roughly 2-3 synths total to make, at 200-300 exp per synth. It didn't take very long either, maybe under an hour.

So, i have a quarky question, i havent crafted much, but saving materials in crafting classes id like to lvl up, should i go threw the list and see what isnt needed and sell everything, do you think it would be worth the time...
I'd hang on to anything except parts (like tabard fronts and cotton sleeves, etc). You have that extra 300 units of space to use, and the old synths still work. whatever equipment you make is just more exp/gold for you, even though I doubt dated equipment will sell for much. Still useable for materia though.

Besides, the exp you gain while crafting these things can go towards the spiritbond on your equipment.