Think about what goes into the design of the deck:
1 box
1 back
1 Ace of Spades
1 or 2 jokers
12 court cards
4 custom pip designs
39 additional pip cards
Those are basically listed in descending order of "flash" - that is, the box is going to be in pretty much every photo of the product, and is sort of the deck's "signature". The back is next, then the ace of spades. The court cards are an item as a whole, but look at how much work it is to produce custom court cards. And as a performer, consider what side of the cards your audience will see the most?
Frankly, if you pour time into an awesome back and a flashy box, you're going to sell a lot of decks. I'd wager it takes at least as long to do a set of custom faces as it does to do an entire regular-faced custom deck, easy. So if you can get away with color changes on the faces and push your box and back, there will be those who decide it's better to do two different decks with the same effort it would take to do one with fully-custom faces and pips. Is a deck with custom faces worth twice the price to you?
I believe that is where the "artisan" decks come in. Low- to medium-sized production runs of artist-produced (or small team-produced) decks, such as Vortex, Revision One, and the upcoming Ornate deck, among others. Those will fill the gaps, and continue to keep the bar higher than it would otherwise settle to. Look at what is available now compared to five years ago, and how we got here. Those focusing on volume will fill one niche, and those focusing on detail will fill another. And there will be the occasional brilliant crossover, of course.