Maybe Konami is going to add more game modes for gems or new ways who knows I wish I knew the reason why Konami nerfed the amount of gems. We get it could be cause of 5Ds there is many reasons so it's hard to say for sure.
Konami will most likely send something in-app, as they have in the past, to address certain issues and clarify a situation; we won't know until then... what we can say for sure is that the Stage cap will increase for both DM and GX, and those will most likely have gem rewards as well.
After reading through Xenon's link, I would say it's neither good or bad...it's just balance. There are always high and low points and we need a lot of data to know exactly which direction the game is going. It's only a few months worth of data, but it does seem to support my arguments up until now.