I agree. Imo, it's just not worth the effort. If you ever dim the lights for viewing, the brightness of the LED really detracts from the theater experience. No other HDTV satellite receiver has a LED display, so its certainly not a concern for most folks; if it were a cause for complaint, other providers would have added the feature long ago.
If VOOM wants to add the feature so that it can be turned on and off, that's fine. I can always turn it off. That said, this should be far down on their list of priorities. There are far more important issues, both STB and otherwise, that require VOOM's attention. Developer resources are limited, and I would much rather have them working on the code to stablize the box, fixing stutters, fixing 720p DVI signals (with DLPs), adding a return function, adding a direct-to-favorites list option, making the guide return to the currently selected channel, software to add MPEG-4 support, etc.