Not sure if it's considered "all" the effects, but a tombstone comes up out of the ground, saloon doors swing, and a verandah 'breaks' from someone falling off of it. More or less the same as before, although I don't really remember the tombstone bit from before the maintenance.
OK, now I'm home I can elaborate a bit more on my experience ? Overall, I really like what has been done to beef up the ride as well. I confess I initially was a little disappointed to still see the absence of some of the original effects previously discussed, especially before the final drop. I don't remember the old TNT barrel with sparks that everyone keeps reminiscing about ? But it sounded awesome, and I was hoping it would make a comeback. That hasn't been the case. However I blame myself for any disappointment on my part, I think I just built my expectations a bit too high throughout the duration the ride was down.
That aside, I think the train scene (love what they have done to the track!) and the abundance of TNT on the walls throughout the mountain are definitely the biggest improvements made. I also liked what they did in the first turntable room, one of the walls features a well lit mine shaft of fair depth. From memory it was there before, but all in the dark. It's good to be able to see everything now ??
As @joz mentioned there is still some bugs they need to iron out, the biggest one I could see was the dry final drop (they had the water effects turned off for it) which made it essentially just like a coaster track. I did also notice the lack of usual audio commentary before the backward drop.
Either way, it's good to have our good ol' WWF back and I know these issues will undoubtedly get ironed out in the next few days. It's fantastic overall to see it in the best condition it's been in a long time (13 years?) ?❤️