As we all know, in AJE NM has a very important impact on the performance of your troops on the battlefield. We too know, that garrisons will most probably surrender, if their moral is lower then the moral of the siege-force. That leads to a strategic problem: The weaker side will avoid battles and use fortress 2+ cities as strongholds or to buy time. In RL, strongholds played an important part, often to withstand a siege for long time. In AJE, if you are on a way to defeat (or simply start with low moral), you have bad chances on the battlefield AND your cities fall quite quick.
I'm thinking on the Sertorius-scenario. Sertorius starts with 120 NM, Rome with 80 I think (dropping a few points in the first turns). The result: Carthago Nova falls within 1-2 turns, Gades too (or you send in legions, whome you will loose).
Of course I can see the sense: Soldiers with low moral will not fight so hard and are more likely to surrender. On the other hand: If the garrison-surrender would not (or less) be linked to NM as to discipline (for example), it would be more likely for stonghold to withstand a longer time.
In other words: For my feeling, fortresses fall too quickly due to NM. There are many examples of desperate defenses in history, and it would give fortresses more strategic value.

By the way: I reported a bug, that fleets cannot evacuate troops from sieged cities, but got no answer. Is it a known issue?
