The sluggishness I describe is about the movement, especially jumping. Given how terrible and unrealistic it looks, I'm assuming it's a limitation of the physics engine they might have developed (if they're not reusing Havok Physics), but I'm not sure. I hope they can improve it, or reintegrate whatever they used for Warband, because it's really bad.
In terms of combat animations and stuff, Bannerlord MP has already been full of shock infantry spinning around and doing unrealistic/unconvincing manoeuvres. It was dubbed "ballerina shock infantry" by players during the beta even. If your gripes are with realism, I'd suggest M&B multiplayer will never actually be realistic-looking, so long as it has free-form combat with directional attacking. People will always find weird ways to play effectively. Even new players or "roleplayers" like Metafa find themselves jumping around like a frog unrealistically.
You can't tell me this looks realistic:
I'm all for adding more animations to make things look more presentable, just so long as it's visually reliable and it doesn't interfere badly with the mechanics of the game.
This thread covers what I think about the responsiveness of combat:
They reduced block delay in the 1.5 patch, but if there's still responsiveness issues, especially in attack animations, then that's a deal-breaker really. It's not a commendable combat system. Either it's a mad experiment gone wrong (like a Frankenstein's monster of a game) or it's a strange attempt to dumb it down (or possibly both).
If you're having trouble against left spam in Warband, watch this video on how to counter it:
Or try using outrange like this:
Or try using kicks. Or try chambering. Or work with a teammate to bring them down.
Also, if someone keeps feint-spamming, punish them by attacking quickly when they start doing it, rather than blocking.
Or, if you can't be bothered with any of that, just play against some bad players in Siege. In Bannerlord too, there's bad players in Siege and TDM. And if MM gets better with a bigger playerbase, then that can match you with players of a similar level.