I started the game late into season 3, managed to get basically everything in it by power-grinding the last weeks. Then kind of fell off in season 4. I didn’t find the corruption theme very interesting and didn’t much care for the new boss fight either. I’ve started getting back into DRG though, (thanks to Survivor haha) and being able to catch up on past unlocks could be a fun incentive, especially for anyone coming in new at season 5.