I can't speak for anyone here, but it seems to me that the icons do not fit the material design guidelines.
The icons such as the fireplace, wall-light, record are hard to identify without the specific labels. While the the Sky Q Box is too specific (and could be a generic DVR box icon instead). Also, icons such as the Lava Lamp and TV already exist.
However, that being said, I do appreciate your other icons you have created which you have on your website (as shown on your GitHub account).
Thanks for your submissions. There are just a few things that I would like to point out with each icon.
Fireplace would probably need "fire" to be recognizable at the smaller size. The shape is too easily to mistake.
We're trying to consolidate icons into single icon per requests. I'm going to close this issue out. Please open an issue for fireplace (useful for Home Assistant users).
@MrGrigri I don't really understand the explanation for icon 8. The television icon we have doesn't look like an actual television as it is clearly not widescreen 16:9 aspect ratio. The one submitted by @jonohunt addresses this issue, it's much better suited for modern applications. Just look at the youtube-tvicon as a comparison.
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Thanks for your submissions. There are just a few things that I would like to point out with each icon.