The A D back and forth sucks at the beginning, but it gets to the point where it is almost too fast. For those who don't know there is an ability in the sex skills tree that allows you to see the enemy's preference on sex positions, after you unlock that skill there are 4 other abilities that allow you to change positions with the enemy. If you use the enemy's preferred position the enemy's health drains way faster. Eventually you can fuck entire rounds to death in the arena mode reasonably quick with a decent skill spec.
For some wandering about the skill trees, I'm fairly certain that aggression is leveled by melee damage/melee kills, composure is by ranged damage/ranged kills and old school is from healing yourself/taking damage. (could be completely wrong, just my observation)
Also a crash that I ran into quite a bit happens whenever I'm playing on rounds in the arena at or above 14 or so, not sure if it's actually related to rounds. But the spitter enemy's seem to crash the game if you let them grapple you at a weird angle or if you try to move when they lunge for you. Another bug is the last unlockable mask in arena equipment defaults the characters hairstyle to bald once a h scene is initiated.
The game is decent enough though, been following since it was basically just a 2D/3D sidescroller kinda style. I'm interested to see where this goes.