Because what they came up with was better... I'm still sad that Bannerlord will be better in almost all respects but the melee combat controls. Guess it has to work for controllers as well...
I ended up hating those controls. Its probably the most off putting thing about that game. The lack of Epic, the deletion of the forum (wtf..who just moves a smallish community like that), the turning their backs on an established community without ever really giving a full explanation for the disappearance of the Donkey's and the lack of cavalry were sore spots, but it was the controls that ultimately made it not very fun to play
After a while it felt like all anyone was doing was try to make you fight the controls rather than fight the player with the game mechanics as they were intended. Having the camera direction forever tied to both the block direction and the swing direction was so awkward. It was like playing an FPS game in which every time you look left you can only shoot to the right, or every time you want to shoot right you have to move the camera to the left. It was a nice gimmick to start with, but then after many hours it was just a chore and didn't really improve on M&B. At its core it could have sustained itself with a solid melee combat system and decent controls but without even that they were doomed without Epic and with the Donkey's leaving without ever addressing what happened.
I guess since the servers are getting pulled and the game won't be sold anymore we could find out what really happened from the Donkey Crew's perspective soon. I still think that game could be salvaged if they went back to the basics of the controls and melee combat, added some cavalry and had a decent single life game mode and marketed that as the main game rather than the respawning game modes. Maybe once the dust settles Donkey crew can re-acquire some of the assets and make a new game?