These are the improvements promised by version 1.13.
As u can see, none of them regard the major battle realism problems we have discovered.

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Re-balanced AI.
Improved sprites.
Improved unit management.
Intelligent texture management.
Honour displayed in chat rooms.
Option to disable throne room.
Christian Daimyos displayed on alliance screen.
Shift key highlights region output.
Quick buttons for info parchments.
Repeated attacks on same region reduced.
Hojo advantage reduced.
Daimyo's without heirs are more cautious.
Penalties for breaking alliances.
Allies more reliable.
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The patch should be released by the end of November.
It is surely going to alter the main code, therefore we are to get organized.
I am honoured to notice that the official site has talked of "the OFFICIAL patch for the game" as all of you can see.

We all know what this means