I could actually try to answer this question since I went on hiatus in 2008 and came back in 2011. Maybe it's just my imagination but I noticed a few changes in style:
- Everybody is doing pan/zoom/camera motion/mask transitions
- People have increasingly learned how to AE
- Cross-overs became more popular (Umika's amvs being the best examples here)
- Beat sync is dead
- Amvs look more and more like they're made by graphic designers
About the org:
- Fewer active members, less active forum
- Nobody leaves opinions anymore
- We are still pretentious
