I find having to swap the weapon during fighting to use the rune that you want to use is very annoying and generally not fun. I would much prefer the rune system for combat to be:
1 - You can place any rune in a slot from any weapon you have equiped and when you select that rune, it automatically changes to the weapon and then you stay in that weapon unless you manually change.
2 - Increase the rune slots to 6 or 8 and include the dpad option on casting runes. I don’t think there is anything else you can do anyway while you have rune casting selected.
In general, manual weapon swaping while you are trying to pull off a combo is not fun and often leads to the combo not working. It only takes a short time to swap, but with the fights in Wicked without a perfect execution, it can often mean the difference in a successful combo.
I really like the fact that there are three weapon slots and I would like to see more reasons to use them all.