This sounds very efficient. I remember many years ago there was a karate school that taught a "condensed" version of the art. They only did Pinan 1-5 up to blackbelt and did Kusunku as a blackbelt and that was it, 6 kata. They kicked and punched the makiwara and sparred constantly. They had so many trophies in their window and had a reputation as hard fighters. Sometimes less is more. All these endless bunkai never win a fight, but hard and fast punching and kicking will. This is in a striking context, of course.
I know that a lot of us at my old school felt that there was too much stuff to memorize. I was able to keep track of it all, so this isn't a "I can't do it so I'm just gonna whine."
One of my friends has done probably 30+ years of martial arts, but most of them he'd only done for a couple years until the Army moved him around, and then he'd pick up something different. He did manage a 3rd degree in KKW and 4th degree in ATA, but also dabbled in BJJ, Hapkido, Tuk Kong Musool, and a bunch of other stuff. He was getting frustrated that we were doing more forms and not transitioning to application.
My parents were 2nd and 3rd degree. They were in their 60s and struggled to keep it all together. My Dad said at one point, "I can memorize everything or I can improve what I know, I can't do both." And I certainly saw people focus on memorization and not improvement, and saw others who would only focus on what was new and not what was old. I was the only one (besides the Master and his wife) who could keep track of the whole curriculum, both colored belt (as an instructor) and black belt (as a student).
Even my Master couldn't keep track of the 3rd degree stuff. He hadn't done it in a while, and so every time he'd show me the latest stuff, he would remember it differently. Even the 2nd degree stuff he'd waffle on whether a punch defense ended in a punch or a limb destruction (and if he thought different than you, you were "wrong").
Up to my level, we had:
- 67 memorized combos (11 intermediate, 21 advanced, 35 black belt)
- 30 unarmed forms (5 Kibon, 8 "Palgwe", 8 Taegeuk, 5 Yudanja, 4 Yudanja variants)
- 157 self-defense (96 before black belt [no more than 26 per test], 60 after black belt)
- 28 memorized weapon combos (15 nunchaku, 8 escrima, 5 double escrima)
- 10 weapon forms (1 double nunchaku, 2 staff, 2 knife, 5 sword)
Compare that with my plan, which is that someone testing for the same level would need:
- 8 in-house forms (+2 self-created forms)
- 3x memorized combos (self-created)
- 10x memorized self-defense (self-created) or 10-minute presentation on a self-defense concept
There would be more in the test than this, this is just the rote memorized material I would expect. And the class wouldn't always focus on what's required for testing. If this is all you need to prepare specifically for the test, you have more time to train for things other than testing.