I have to say the oval is a pretty bad idea anyway for blocking, and I'm not sure why they didn't go with how Paper Mario did it. Watching the oval does lead to quick blocking sometimes, but then you can't watch how cool their attack animations are! In Paper Mario they played around with this as well because enemies would try to fake you with their attack animations.They seem completely off, and I'm playing it on PC as well. They tell you to hit the button to block as the block oval appears, but you have to actually hit it on most attacks a split second during their attack animation, before the oval appears or it won't block. if you wait to block when the oval appears, it seems like you have less than a third a second to hit the button, and usually that's still too short. Honestly, there's a delay. Because I can hold down the button as they are attacking, right before you're actually supposed to block and it will block.
I finished the game last night and I fell exhausted from all the action and laughs during the last 3 hours of the game. I've finished most of the side content this morning apart from one particular quest, but I think I'll write my thoughts on this game later. I really liked it overall, but some decisions about the combat really bug me (doesn't help that my mage was pretty much broken on my first hardcore playthrough).