Lots of the skaters doing double SBS jumps are adults that also have to earn money. Their training hours may be more limited because they are working/coaching, so the time they do have available, they spend on the high value pairs elements. Personally, I'd rather see well executed lifts, throws and death spiral, so I'm happy with those choices. Well synchronized jumps and spins can be breathtaking, but synchronization doesn't seem to be well rewarded these last few years so we're seeing it less. At least the SBS doubles seem to be better synched than many of the triples we've seen the past few years!
As far as the throws go, I'm primarily seeing the double throws from newer pairings or junior pairs - in those cases, it seems to be a learning curve and they're working towards triples. I think the biggest difference is that we're seeing teams in major competitions that in prior years would have remained at home. As others have said, this is a rebuilding season.