But to your own point, the drop is still plenty visible - we've been watching videos for days now of logs dropping down it, as tall and as fast as ever. Losing heighth off the top of the building doesn't really make the drop beneath that look any shorter.
I really don't get the impression they're trying to be any more welcoming to small riders than they were before. There were already plenty of 4 year olds who weren't deterred before. I don't think any child who would have been afraid of Splash will suddenly want to ride Tiana's just because the same big scary drop is surrounded by flowers and is missing a pointy tree above it.
Besides, what good would that do them? The drop is the drop. The only thing worse than children being scared of it from off the ride would be being ambushed by it ON the ride. They learned their lesson from Alien Encounter. Keeping scary secrets is bad for business.