How does the rebuilding mechanic work in 1.40, and how does it differ from the one in 1.37 / 1.38? Maybe someone can shed some light on this?
In 1.40, the library rebuilding mechanic in Tower cities is disabled by default; it needs to be enabled separately.
In my opinion, this option is unnecessary. Tower is one of the weakest castles, and this further deprives it of almost its only advantage. I think it would be reasonable (and even then, only conditionally) to allow rebuilding the library only in the castle's home city, and prohibit it in other cities.
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