Hi everyone... I am back in the town; didn't try 1.52 yet, 1600km in car overally, so I feel a bit exhaustedl; I will look and reply tomorrow.
On a side note, I'm glad that my hint about number of processed vertices for 2D primitives count was seen by Firaxis

That big number after '/' in 2D_FRAME_VERTS - the value I would be having hard time to reduce.
I think they're in same trouble with their memory-fix as I was with 'vid_mem_usage' all this time - it either crashes or slowes down. Well, bad hashing optimizations might be causing slowdowns too... all that's from user opinions, I didn't try it by myself yet.
(vid_mem_usage = VB_CACHE_SIZE) - these values are similar. 1Mb = 1024*1024Kb, that's why Harkonnen.ini values looks a little different.
Merry Christmas everyone!