Yes, I have the set up you are describing. And I took the same decision. I have a friend with the big sub and is amazing. However, with small rooms it looks too much. With the Sub Mini is balanced. On certain films is impressive. However, you don’t feel it is there always with Music. But if you modify the parameters on the app and you increase the Sub you can notice a difference. However, afterwards is too remarkable with the films.
To conclude, it is a good option, for small rooms more than enough.

Same combination here, with the room size mentioned. I can only confirm this. By the way, another advantage of the subwoofer is that the Arc has more capacity for the mid-tones, as it no longer has to take over the low tones. It then sounds audibly better. It is important to calibrate with Trueplay!