There should be an option created in the settings to turn off the LED on the front of all Roku devices if you don't want to see the annoying light. Just like there should be an option to disable the completely annoying battery notification that pops up on your screen when the batteries get low or sometimes it just pops up because it's glitching.
You'd think with the amount of time Roku puts into updates they'd think of these basic things to remove annoyances. But nope, they'll never do anything about either of these things. Roku lacks common sense and cares little for customer satisfaction.