I have great hopes for bannerlord.
But music-wise, please please don't follow the trend of most games these days and have music playing continuously. Think atmosphere: Birds chirruping, branches creaking, flags flapping, soldier's trudging through the mud, horses whinneying, swords clashing, warcries bellowing (and not that godawful racket from the soldiers shouting in warband mount and blade that would force me to turn off the sound), or wounded screaming, and all followed by the calm after the storm as the battlefield settles into silence.
So of course the devs are adding music, and the clips sounded epic, but don't waste all that hard work!! Use it as a tool to ADD to the atmosphere - not overwhelm it. Play a song, then have a break of 3-4 minutes of no music, then play a different song. Or put songs on triggers on certain events, i.e. first encounter with faction/ entering city for first time/ entering inn/ meeting a king. Make us look forward to the rare event where that epic tune is suddenly and unexpectedly played.
I beg you, don't just make a playlist and put it on repeat with the best song playing over and over. Don't make one or two songs and play them in every battle. Such an approach (adopted by too many, quite frankly lazy, game devs) is intrinsically flawed. Common sense says you don't stick 10 tracks on repeat. You get sick of it after an hour. Even with a playlist of 'only' 50 songs (for example on an ipod, as rarely do games have that many, GTA excluded) you get sick of even that many pretty quickly, a week or two tops. You will get exhausted of even chart number 1's after hearing it 30 times in a day or two... Music then gets muted.
It can be done well. Many examples come to mind, but first to mind is skyrim's dovahkin music - despite the huge amount of work and full orchestra involvement - this was really only ever played on menu screen (and possibly rare boss battles at the end adding to the sense of epicness of the fight when you heard it). It won awards for a reason.
And don't just ignore/chuck out those tester single instrument pieces. Why not use them for a random musician in a village square, or an inn, a bard practising or messing around. Loads of atmosphere for little effort. It's instant injection of character and soul to a village.
Apologies if I laboured the point, but I would really love Bannerlords to be great!