Let's try default High Quality for object align, it's slow but it's simply the correct way, users can disable while tweaking the align modes and then enable again for final result IF they are working on *dense* meshes

release/scripts/startup/bl_operators/object_align.py

@@ -340,7 +340,7 @@ class AlignObjects(bpy.types.Operator):
     bb_quality = BoolProperty(
             name="High Quality",
             description="Enables high quality calculation of the bounding box for perfect results on complex shape meshes with rotation/scale (Slow)",
-            default=False)
+            default=True)
 
     align_mode = EnumProperty(items=(
             ('OPT_1', "Negative Sides", ""),
@@ -380,4 +380,4 @@ class AlignObjects(bpy.types.Operator):
             self.report({'WARNING'}, "No objects with bound-box selected")
             return {'CANCELLED'}
         else:
-            return {'FINISHED'}
+            return {'FINISHED'}