What happened to the Coliseum in the past week?

You have probably slowed progress, either you have hit all the feats efficiently for the last marquee or stopped spending ahead of the next marquee. There will be players who are rushing to finish up feats before the marquee changes who were a bit behind and as they catch up there’s more competition. I think it’s why we get these pauses to allow players to catch up so if someone is inclined to spend they have to spend again every marquee.