travolter
Thanks for your answer.
I dont have enough cpu to run these settings
What CPU do you have?
I have core 2 duo (at work) and core i7 920 (at home).
See my System details.
you are limiting SVP if some values cannt be changed
Yes. We are. It is special for END users. And for GOOD quality.
Im using rfilter=0, sharp=0, search=4, chroma=false, mode=0 for saving CPU cycles
Thanks for this info. We uses search=4 too. Another settings you say are still untouched.
May be in near future. 
mvtools2 works better when you do x2 x3 x4.. etc instead of using x2.4 (25->60)
You are right. It is because of saving all source frames in output. Special for this we have 1m- and 2m- coefficients. Take a look. You will be surprised.
Of coarse, true (not 1m or 2m) 24->60 interpolation are losses every second source frame. The result is more noticeable artifacts.
All the clips available are 24 25 or 30.. so I decided to set monitor to 75hz and convert all videos to 25fps and then apply mvtools. (25->75 x3)
It is strange to hear, especially about 30 to 25 slowdown. 
I use coefficients 2.4x, 2.5x not only doubling and ReClock for this purposes to save synchronization.
lambda=(blocksizex1000)/64
I need to look at source code. I'm not sure that this setting is not autoscalable by blocks size like thSCD1.
To search with value of 1000 and to repeat search with value of 250. It has to reduce coherence of vectors.