The mod premise is fantastic in its design and the avenues it opens up for immersive gameplay, but I agree being at the mercy of AI commander long term might be annoying. Seems more helpful in early game just to power up in a better way. Maybe if this request from Jance on AI weighting decisions is approved we might see more clearly long term AI goals, maybe even edit them.
https://forums.taleworlds.com/index.php?threads/please-expose-explain-ai-behavior-weight-calculations.444156/
Sorry can't find it at the moment but I'm sure I saw Mexxico explain it in a thread before that it's something like the AI decisions are like a "Leaderboard" with highscores, with every entry gaining or losing priority points based on many variables like distance, army strength, the AI's role (vassal,mercenary etc). Whatever is the highest score is what the agent will travel towards, so different issues like "your fief is being sieged!" or "Herdsmen needs more sheep" have different weighting and that is why we sometimes see those AI armies on campaign map move erratically between objectives.
Would be quite cool to see under the hood on this as I trust modders could have a field day with it, but I'm not sure they would want to expose that function in early access.