I have a Sonos Home Theatre with an Arc, a Sub and two One SLs.
I am very satisfied with the system, yet, after about one month of daily usage, I begin notice there are a couple of features missing, that would highly benefit users.
First one, is an OSD volume level. I’ve read at least one other thread with this request, and some users replied that it is a TV feature, but in fact it’s not. Depending on HDMI-CEC implementation, TV might show just an indicator if you’re increasing or decreasing volume, but I haven’t seen yet any TV showing a real volume indicator. To get that info, it has to be generate by the Sonos Arc (in my case). This is possible, using HDMI-CEC to send this info to the TV. In some cases, like mine, I use an Harmony remote that controls volume directly in the Arc, not passing though TV, and in this kind of cases there is no indicator at all (not even if I’m increasing or decreasing volume).
Second feature request is the ability to schedule Night Mode and Speech Enhancement.
This is pretty useful if you live in an apartment, as the low frequencies combined with thelowest volume level being a bit loud late night makes it pretty impossible to use the Sonos System without turning on Night Mode and Speech Enhancement. Currently, I managed this via iOS Shortcuts, but having this built in on Sonos app would be perfect.