Your graphs look really good. I bet things sound excellent!
1) Is your front right speaker closer to a wall/corner than your Left? The Right looks like it is experiencing some boundary gain the Left is not. ARC has done a great job with it, so nothing you really need to do, unless there is some room to re-position the right... but again, there is absolutely no reason to waste time on this as ARC has done a great job here. More of an observation than anything else.
2) Your sub looks like it may have some filters enabled. Set all filters to bypass or as high as they will go for Low Pass (typically something like 180Hz) and as low as they will go for any High Pass filters (something like 15, 20 or 30Hz usually).
3) ARC did not set much Room Gain for you. Based on the flatness of your graphs, I'm guessing your room is pretty dead? If that is the case, to much Room Gain may sound odd in your room, in which case ARC has picked a perfect value. However if you would like to try adjusting the Room Gain, a value of around 2.6 might be a good start.
I would recommened listening for a solid week before you play with #3, if you decide you want to play with it. Give yourself a chance to get a good base line without any changes from what ARC set first, hence the week of solid listening... once that is estabilished, you can try adjusing it and see if it is better or worse (as it appears your room does not naturally have much room gain).
Adjusting the Room Gain does not require re-running ARC, as you have probably already read by now, so we can do it at any time down the road (assuming you saved your ARC calibration file).
Enjoy! Your setup looks really good.