You can permanently alter the stats of a soldier during battle or coming back from a battle using script functions.
Okay, let me understand this, the decay stats of a soldier, you can permanently alter in a battle, but will this stats transfer to the next battle?
Like you posted, "though not a per-geoscape-time-period decay."
Sorry, I need more clarity on this detail. You mean on Geoscape, the decay stats not stored?
I had consulted with Meridian, once a soldier is clone, it is possible to put a market on the soldier.
I wanted only 3 outcome.
1) X days before decay starts.
2) Decay percentage per day.
3) Final stats before decay stops.
Although soldier can continue to gain stats again through battle, but ultimately the decay will over ride it. This kind of feature has application like realistic experience decay, should some one request that feature one day. A soldier could decay from not training or in constant battle.
Or have taken something to have stats gain and then loses it over the days or weeks.
I just wanted a more fun and realistic game play with the cloning feature.