I personally believe that the crafting event in the Workshop should be changed. As of right now, it is literally the only option in the game to get the equipment you want without having to rely on RNG. Obviously, something like this needs to be limited, which makes sense. But the event only allows for one piece of equipment, and when you have at least 4 characters and 6 pieces of equipment per, and RNG isn't being nice, that's basically nothing. So here's my idea: 

1) Increase energy requirements for each stage, like selecting piece and set to 750, and the substat rerolling to 75, and instead make it possible to craft 2 pieces of equipment. 

2) Increase energy requirements for each stage, like selecting piece and set to 1000 or maybe even higher, and substat corresponding, but making it possible to craft as many pieces as you can rack up in the time period of the event, with the event time being shortened so people can't just crank out tens or maybe even a hundred pieces.

This way the workshop events are so much better, the only method to obtain good equipment is already so RNG reliant, this would make it more bearable by a lot!