@Jehiel nobody's looking at Warband through nostalgia glasses.
I never said anything about marshal system being a flawless masterpiece. It was a barely functional broken mess, but at least we had some way to issue commands to other parties. Bannerlord is somehow even worse because you don't have this option (and no, the army system is not an adequate replacement).
In fact, that's the best way I can describe the overwhelming majority of features in Bannerlord - they are equally bad or somehow even worse that in Warband.
Diplomacy was already terrible with no options other that "me declare war" and "me sign peace", but now it's somehow even worse due to removal of truces and kingdom destruction. Plus, tribute mechanic is absolutely horrendous.
Relations with lords were pretty lackluster to put it politely, but now they're so bad it's laughable. You can have - 100 relations with somebody and marry their daughter without any problems. Or be the most hated person in the world due to executions and still being elected as a new ruler of your kingdom. Don't even get me started on how much marriages have regressed.
Prison breakes were already bad, now they are even worse. At least in Warband you fought through the actual city/castle instead of some generic boring prison dungeon.
You see the pattern here? Warband was never a good game (blasphemy, I know). It was a broken mess with some promising ideas in desperate need of polishing, but Bannerlord's take on these ideas is at best equally bad, and most of the time it's somehow even worse.
Also, nobody realistically expects Bannerlord to be "CK3 with battles". What people do expect is core mechanics that you spent of lot of time interacting with being at least tolerable.
A quick example - Bannerlord has the worst diplomacy system I have even seen in a game. I don't want it to be as complex as CK3 or EU4 or whatever. I want it to stop being literally the worst ever implementation of this feature. Is that a bar too high for you? Because for me it certainly is not.