I think TPCi should go beyond the typical 4 main booster sets per year when it comes to releasing booster sets.
What I am trying to say is, do some side booster sets, just like what MTG did with Modern Masters and Conspiracy, and what Yugioh does with the battle packs, and the hidden arsenals.
So for this, they could do something similar to dragon vault, except that rather releasing them in sets of 3 in a blister, release them as 5 card packs individually, and make the cards in the set all holo, or if they are not all holo, price them at a buck or so.
To summarize, TPCi should do mini-sets.