Hmmm, I don't think so. GK siege maps were always either too easy to defend or too easy to capture. GK siege nights with 2 rounds per map always end with one team's top player having below 10 kills (in a 40v40 most of the time). Timer was 10 minutes for all maps even though all maps had different layers of defense. (some having only one so good luck defending that)
On another note, I would find it really cool if some comp maps from warband could be remade in Bannerlord. (A,B,C flags could be at the same spot as the three locations.) I feel like naval outpost or castellum would be super fun to play on skirmish for example. (with some adjustments for the size and the spawns of course)