I totally agree with you about the lack of feedback for the player. Assets for life bar was ready but I was short in time to add it. We need to find a way to be more explicit during the role swap. We thought we could reverse the camera, because player often play the character at the bottom of the screen... But we want the player to be a bit confuse and surprise.
I didn't expect remark about the character acceleration time, I will check that and try to improve this aspect.
Thanks for the feedbacks!