What do you mean with "more angular"?
As you probably know, shots of the original K-7 model are scarce. While many people have interpreted the design in the same fashion as you...

...Greg Jein, the man who designed the new K-7 model for the DS9 episode 'Trials and Tribble-ations' went with a more rounded appearance:


This is because, in addition to the original on-screen evidence...

...it is believed that the original K-7 was based on a Douglas design for a modular space habitat, made of unfolding wedges:


Anyway, as I commented in your bridge thread, that's a nice design. It fits well in the TOS era.