Luuk added a bunch of statistics across all of your play sessions and some global ones (this uses Steam statistics, so they are only available when playing through Steam):
And we decided to make a somewhat breaking change: we’re changing the terrain to use less steep half-unit high slopes. Naturally this includes placing rides and walls at half unit high increments and less steep stairs.
To keep old savegames compatible they will continue to use the steep terrain and only new parks will use the flat slopes.
The old steep stairs will still be available in old and new parks.