Adding more bars by default isn't going to make the UI any more complex, I don't comprehend such an argument. Is having two rows of abilities going to confuse and anger you? Now I'm not going to say they should make something like that the default because I'd rather the ability to expand it as much as I want or even to use floating hotbars.

Now for anyone who can't understand why we want so many spots, or who say we won't use all 30 or 40 spells in a single battle the reasoning is quite simple. If its not readily visible the player can forget they even have that ability available in a situation that fits it. When i was first playing and started getting skills added to my 2nd bar I forgot it was even there most of the time. I didn't get used to swapping between bars until hiberheim and forgetting spells my MC just learned. Meanwhile if I could have the bars visible all the time I wouldn't have had those problems. Now that I'm stuffing far more than 30 abilities into 30 slots I find myself forgetting about things on any of the bars at all, like burn my eyes when wandering around a trap infested area to the point where I'm casting from the skill menu.