MS250 & Coral, I think that I might have been misunderstood. I do not know what problems the TAAATS upgrade has introduced so I was asking if the upgrade has made the sequencing of aircraft for approach more difficult. The descent earlier today was more complex than anything I can recall in a long career so I thought that there may be more behind the scenes than the controllers just having an off day. We weren't the only aircraft in the sky but at the same time, the airwaves didn't sound particularly congested.