diff --git a/.idea/.idea.osu.Desktop/.idea/runConfigurations/osu_SDL.xml b/.idea/.idea.osu.Desktop/.idea/runConfigurations/osu___legacy_osuTK_.xml
similarity index 79%
rename from .idea/.idea.osu.Desktop/.idea/runConfigurations/osu_SDL.xml
rename to .idea/.idea.osu.Desktop/.idea/runConfigurations/osu___legacy_osuTK_.xml
index 31f1fda09d..811fd9cc6d 100644
--- a/.idea/.idea.osu.Desktop/.idea/runConfigurations/osu_SDL.xml
+++ b/.idea/.idea.osu.Desktop/.idea/runConfigurations/osu___legacy_osuTK_.xml
@@ -1,7 +1,7 @@
 <component name="ProjectRunConfigurationManager">
-  <configuration default="false" name="osu! SDL" type="DotNetProject" factoryName=".NET Project" folderName="osu!" activateToolWindowBeforeRun="false">
+  <configuration default="false" name="osu! (legacy osuTK)" type="DotNetProject" factoryName=".NET Project" folderName="osu!" activateToolWindowBeforeRun="false">
     <option name="EXE_PATH" value="$PROJECT_DIR$/osu.Desktop/bin/Debug/netcoreapp3.1/osu!.dll" />
-    <option name="PROGRAM_PARAMETERS" value="--sdl" />
+    <option name="PROGRAM_PARAMETERS" value="--tk" />
     <option name="WORKING_DIRECTORY" value="$PROJECT_DIR$/osu.Desktop/bin/Debug/netcoreapp3.1" />
     <option name="PASS_PARENT_ENVS" value="1" />
     <option name="USE_EXTERNAL_CONSOLE" value="0" />
diff --git a/osu.Game.Rulesets.Osu/Difficulty/OsuPerformanceCalculator.cs b/osu.Game.Rulesets.Osu/Difficulty/OsuPerformanceCalculator.cs
index 030b0cf6d1..221da61ce3 100644
--- a/osu.Game.Rulesets.Osu/Difficulty/OsuPerformanceCalculator.cs
+++ b/osu.Game.Rulesets.Osu/Difficulty/OsuPerformanceCalculator.cs
@@ -92,8 +92,9 @@ namespace osu.Game.Rulesets.Osu.Difficulty
 
             aimValue *= lengthBonus;
 
-            // Penalize misses exponentially. This mainly fixes tag4 maps and the likes until a per-hitobject solution is available
-            aimValue *= Math.Pow(0.97, countMiss);
+            // Penalize misses by assessing # of misses relative to the total # of objects. Default a 3% reduction for any # of misses.
+            if (countMiss > 0)
+                aimValue *= 0.97 * Math.Pow(1 - Math.Pow((double)countMiss / totalHits, 0.775), countMiss);
 
             // Combo scaling
             if (Attributes.MaxCombo > 0)
@@ -138,8 +139,9 @@ namespace osu.Game.Rulesets.Osu.Difficulty
                                  (totalHits > 2000 ? Math.Log10(totalHits / 2000.0) * 0.5 : 0.0);
             speedValue *= lengthBonus;
 
-            // Penalize misses exponentially. This mainly fixes tag4 maps and the likes until a per-hitobject solution is available
-            speedValue *= Math.Pow(0.97, countMiss);
+            // Penalize misses by assessing # of misses relative to the total # of objects. Default a 3% reduction for any # of misses.
+            if (countMiss > 0)
+                speedValue *= 0.97 * Math.Pow(1 - Math.Pow((double)countMiss / totalHits, 0.775), Math.Pow(countMiss, .875));
 
             // Combo scaling
             if (Attributes.MaxCombo > 0)