I got back on the Bretonnia hype train thinking about the re-work, and decided to put together a video of how to take Marienburg the frist turn and still leave you in position wipe the orcs the following turn. It's one my first videos, but I hope you find it helpful if you are struggling with their early game!
Unrelated to the video, I think it would take a lot of weight off to have every lord starting with the knights vow unlocked. Early game peasant only armies are really, really weak compared to the unbreakable undead. I'm looking forward to the potential re-work for sure!