They are tying R8, R9, and R10 mats to the coliseum rewards currency, can't remember the cost, and blue fragment data for 1250 currency. They are trying to get people to spend to feed their Relic needs. I think R11 is coming up soon. It's been a year since they announced it and Nov 2025 was the kick off of R10 and Relic Delta. CG is just looking to monetize the game further with minimal effort and incentivize spending. I seriously don't think they care about legacy game mode anymore considering how LSB and LST are everywhere and there's no real Kyrotech Bottleneck anymore. It's all the Blue Fragmented Data holding folks back.
Just my opinion