It bothered me since a while, and finally I have removed the LED displays. I don't like that the segments of the digits in "off"-state still are too prominently visible. It didn't work for me, at least not on Time Fantasy. The original displays simply look better (despite the bad photo, sorry for that).
Actually I swapped the LED displays with the original displays from my Alien Poker. Strangely enough the LED displays don't bother me on AP, perhaps because of the dominant silver frame round the displays.