tweak Balance policy focus-dependent formula, so that the effect is a…

…dditive rather than multiplicative, and having only a single focus used, and thus a spread of 0 between most and least common used focus, can't give a big bonus

default/scripting/policies/BALANCE.focs.txt

@@ -19,18 +19,18 @@ Policy
                 // and for using a greater variety of focus settings
                 // focus used equally -> decrease with HistoSpread
                 // use more different focus -> increase with CountUnique
-                SetTargetInfluence value = (Value + 1) * (1 + 0.5 *
-                    Statistic CountUnique
+                SetTargetInfluence value = Value + ((NamedRealLookup name = "PLC_BALANCE_INFLUENCE_SCALING" value = 4.0) *
+                    ((Statistic CountUnique
                         value = LocalCandidate.Focus
-                        condition = And [ Planet OwnedBy empire = Source.Owner ]
+                        condition = And [ Planet OwnedBy empire = Source.Owner ]) - 1)
                     / (1 + Statistic HistogramSpread
                         value = LocalCandidate.Focus
                         condition = And [ Planet OwnedBy empire = Source.Owner ]))
 
-                SetTargetHappiness value = Value * (1 + 0.1 *
-                    Statistic CountUnique
+                SetTargetHappiness value = Value + ((NamedRealLookup name = "PLC_BALANCE_STABILITY_SCALING" value = 2.0) *
+                    ((Statistic CountUnique
                         value = LocalCandidate.Focus
-                        condition = And [ Planet OwnedBy empire = Source.Owner ]
+                        condition = And [ Planet OwnedBy empire = Source.Owner ]) - 1)
                     / (1 + Statistic HistogramSpread
                         value = LocalCandidate.Focus
                         condition = And [ Planet OwnedBy empire = Source.Owner ]))