Interesting idea, but I fail to understand what lucky dice have to do with Jyggalag. Does he just hate luck?
They're not "lucky" dice. They're "predictable" dice. Whatever the roller
expects his roll to be, his roll
will be.* Jyggalag is the daedric prince of order. He hates disorder, randomness, and creativity. He loves orderly, predictable, symmetrical things. The dice rolls aren't random, as they normally should be. They're 100% predictable.
* This also means that, if you're a pessimist, you're screwed!