I loved the announcement of which couple was taking to the floor and the caption with their names on screen. Classy.
And at the end of the dance they’d curtesy/bow, instead of jumping around shrieking ‘WOO!!!! YOU NAILED!!!!!!! AMAZING!!!!!!!’ like a toddler given free rein at the Haribo stash.
I read it was because the later era of pros lack experience and choreographic expertise in 10-dance unlike the early and mid series pros (lots of Burn the Floor alum arrived).
Yes, I agree that the influx of BTF alumni was when things started slipping into flash over technique. Then Gilkinson and his SYTYCD posse hastened the decline even more. 
It's a shame the BBC decided to move away from dancers with that background. I used to enjoy the technique. I wonder if the hours and pay weren't attractive to dancers nearing the end of the competitive circuit. The pros work so much harder than the judges.
I have heard from people in the dance world that SCD isn’t especially highly thought of by the ‘top’ dancers, not least because the fee isn’t actually that great.
The top pros can earn far far more in the East, for example. Apparently they’re mobbed like Hollywood megastars in places like Japan, and the fees for private tuition are very lucrative indeed. They can make MILLIONS working far fewer hours than they do on SCD.
Let me find the link to something pretty
I read recently.