ToA's system is not complex. You basically use three stances, and you can have the same style of gameplay on every class besides the Mage. So it's a pretty flexible forgiving system. It could be worked on from some points, yes, especially on magic becoming usable (it was actually nerfed instead with Paralyze and elemental damage losing potential to be good). But its main problem is just a chaotic presentation of its concept.Of course, tastes differ, but most people play porn games for the sake of having a good time (if you know what I mean). For such games, complex combat or role-playing systems only spoil everything.
You can always turn on the cheat mode when playing Story Mode. You won't be able to get a Game Over then. And you won't miss almost any content. Most of action happens after defeat, the enemy that you need to defeat to have more fun is probably a Brigans in the mountains.
Will that make you happy and your game casual and relaxing? Please, do it.