I tried making a Soyuz T (1979-1986) using an OKS as a base but I was never satisfied with it. I had to keep increasing the ISP in order to get the historic delta V capabilities of the original since using the historic ISP didn't get me near the delta V that the T allegedly had.
---------- Post added at 10:10 PM ---------- Previous post was at 10:05 PM ----------
My interest in Soyuz variants now is due to the fact that I'm simulating Mir mission by mission and I would like things like a Soyuz T, Soyuz TM-16 with the APAS-89 docking ring, and the original generation of the Progress craft which was still in use for the early part of Mir's life. I like the look of the Soyuz 7K meshes but would like more options with them; for example animated antenna deployments, 7K-TM with APAS-75, have the vessels be one unit instead of 3 docked together, etc.
---------- Post added at 10:16 PM ---------- Previous post was at 10:10 PM ----------
Also, the one thing I love about the Soyuz TM and TMA from Thorton's ISS add-on is the working abort escape system as well as their ability to perform a lifting reentry.