There was an announcement that all U70 stones would be transformed into lower stones in game. The update was then cancelled, but I believe this update should happen.
I think all U70 stones should be changed to U50 or U55 stones. In original DBO there was no such thing of players achieving hundreds of U70 purple stones this easily in lower level caps. Level 70 items wasn't even released back then. I've heard of players already with 100+ U70 stones in their possession. Use your head as a community, thats going to ruin the game.
The game should be making use of the lower stones, and allow the economy and gear to grow naturally. What's the point of the lower stones then? For anyone complaining, U50, U55 and U60 purples, green stones were all still really valuable in original DBO low level caps.
Also, I don't think removing the stones from wagu machine will do much, it will help, but some players already gained an unfair advantage over new players. All stones need to be transformed, and this needs to be corrected from now.