I just made the deck today (finally managed to farm all the SoF cards), so did not do extensive testing yet, but it got me quickly a couple of gold arena special spins, so it is fairly solid.
I have tried to balance the quanta as much as I could while still keeping to 30 cards. I was thinking to add a few Novas to boost the quick play of the shards, but the problem is that 1-2 isn't enough to pull them consistently early, and I can't afford to free up space for 4-6.
So early game can be tricky, you may need to hold back playing an SoF to get enough quanta for a black-hole to delay the enemy setup. If you get 2-3 tower/pend in starting hand, you are OK. With 11 of them in the deck, you have a fair chance of getting enough early. Unupped version would certainly starve though.