I definitely do like Jaquay's work. Caverns of Thracia is an amazing execution of the dungeoncrawl concept. And The Savage Frontier is my favorite D&D setting book by a wide margin.
While I have not read Pharaoh myself, I've often seen it mentioned as groundbreaking, and it later got re-released as Desert of Desolation.
While Rahasia is not that amazing, it really stands out from the other modules in the B series. Very different feel and approach to story. It was the first thing he had submitted to TSR as part of his job application in 1980.
I didn't pick up a copy of Pharaoh until 2015 (and got it signed by Hickman!). I also should have mentioned that as well. Its design and layout are stellar. Really lays into the 3 Pillars in each encounter. It's so much easier to run Pharaoh than basically any 5e adventure.
Rahasia reads better than it plays and could do with some tightening up. But it's serviceable and, like you said, it's different.