After gathering a lot of feedbacks from the demo testers of the Alpha Demo who reached over 850k downloads, Team Ninja has found the stamina system to the disliking of a lot of the testers and suggests they revamp the stamina system.
Edit: Check the video for other changes in the game.
Opinion: I personally thought the stamina system was annoying at first, but it got really easy after learning to press R1 after attacking or doing combos, and the difficulty was actually fair, though really hard at first but after beating the second boss, replaying the game turned out to be really enjoyable not that it wasn't before though.