im reading alot of the negative reviews and they are so far in 3 categories:
missing features -missing features from warband, feels the same as warband
graphical issues/bugs -lag, stutter, graphics bugs, crashing
personal taste- combat doesn't feel the same as warband, it's harder, not finished enough even though it was developed for 8 years.
i should note a lot of these issues are fixable and the game has only been out for 1 day. stuff will be added. stuff will be fixed.
as for the personal taste issues ive seen; the combat rocks to me. then again, i also felt at home in kingdom come and people shit on that combat system even though its one that requires you to develop new skills in-character and out.
combat is definitely more hardcore than warband. you are not special in this game. you may have basic skills if you generated your character this way but you don't start good with any weapon. you aren't flooded with eager peasants willing to die for you. lords do not let an unknown vagabond into their homes in this. thinking you can run into a group of looters on normal difficulty with good ai and wipe them out super easy when you just started don't fly no more.
i actually blame this on the age of warband. its been out so long and people have played it so much that the minor changes in bannerlord completely fucked their expectations brought over subconsciously from warband. block timing is different, shields aren't invisible hardlight barriers, and weapons have a chance to bounce off. in warband you could go full warlord and leave your soldiers behind to wade thru the enemy. the enemy ai is now just smart enough to try to flank you, which most warband players do not expect. in warband you could rope-a-dope an entire horde of enemies into a single line to take out 1 by 1. and the campaign ai is smart enough to run at the sight of your strong force. they know they dont stand a chance, being only 6 of them vs 24 of you. they will run and being smaller, they are faster. this is actually player behavior carried over to the campaign ai and while it is annoying cuz you can't catch up and pub stomp small groups anymore, it feels more real.
all in all, its going to be a hoot for a week or two and thats price enough for admission for me. taleworlds has a history of working on their games, heck, the og mount and blade was one of the first early access games. so they have the history established for me to lend them trust for bannerlord to become complete with time.