If a single book is 30 plus hours to read it'll never be a successful series.
To be fair, at least around 1/5 or even 1/3 of each book is
- Recaps of stuff that happened as the storytelling pans towards PoV character.
- Descriptions of scenery.
- Slow as hell travel scenes
On TV, you can skip the recaps, scenery is implicit, and the travel montages can be made much faster.
I mean, story summaries are pretty much:
- Book 1, works as an independent story, the three country boys and two gals are yanked onto the adventure, during which they learn a bunch of lore and at the end they have a bossfight
- Book 2&3, the boss was just a sub-boss of the real Big Bad, need to grab a bunch of gear. Gals go to level up in wizard school, boys start hunting for that extra gear. Add a couple of prophecies into the mix.
- Book 4-7: The main character does a bunch of level ups with Fremen (oh wait, Aiel) and defeats a few more bosses. A new group (Seachan) show up in force, while they have so far been only hinted at.
- Book 8-11: Folks bounce around and nothing much happens, but getting a bunch of setup for the final battle.
- Books 12-14: Payoff to the previous four books set-up. Plotlines finally getting tied up with massive battles everywhere.
(Yeah, personally at around book 9 I stopped for several years, but then when news got around that the series had finally finished, I got around to reading them. It was ok-ish in the end, but I'll probably not even try reading them again).
Anyway, there's so much filler in the books that condensing those to around Book 1 = Season 1 and then 1 season for every 2-3 books is not *that* difficult if you just cull a bit of the plot kudzu.
Cut out the pointless arguing between Nynaeve, Elayne, Birgitte, and Egwene (and all the asinine Dae's dae'mar stuff) and you will be down to about 8 books. That could be really handy in order to flesh out the storylines in the last three since Perrin and Mat never get the chapters they need to fit into the wheel properly, and so many threads like Lanfear, Moiraine, Isam, Black Tower, Foxes and Snakes, Shara, Seanchan / Tuon, and more, never get any reasonable conclusion, they are just snipped and packed away in an effort to quickly end the series.