Thanks for your opinion !
Concerning Lock-on, your post makes me realize it might not be as intuitive as I thought it out to be, you have to first press F to lock onto the enemy, then V if you want the camera to fix itself on said enemy.
For the difficulty, it does get harder the more enemies you kill as they start to dodge and attack more but as you mentioned, it's pretty easy to abuse the dodge button. The main reason for that is that I haven't gotten around implementing a more accurate target leading formula.
By the way I'm glad you're mentioning Z.O.E. it's the main inspiration for this.