Rename timing changes, simplify + improve columns/dictionary usage.

osu.Game/Rulesets/UI/HitRenderer.cs

@@ -148,6 +148,8 @@ namespace osu.Game.Rulesets.UI
             // Post-process the beatmap
             processor.PostProcess(Beatmap);
 
+            ApplyBeatmap();
+
             // Add mods, should always be the last thing applied to give full control to mods
             applyMods(beatmap.Mods.Value);
         }
@@ -165,6 +167,11 @@ namespace osu.Game.Rulesets.UI
                 mod.ApplyToHitRenderer(this);
         }
 
+        /// <summary>
+        /// Called when the beatmap of this hit renderer has been set. Used to apply any default values from the beatmap.
+        /// </summary>
+        protected virtual void ApplyBeatmap() { }
+
         /// <summary>
         /// Creates a processor to perform post-processing operations
         /// on HitObjects in converted Beatmaps.