Ok Kanthos I see your point of view and I agree that I could edit Programs (that's btw. what I have to do now with no other, better option on the board), but please, imagine the situation in which I have many Programs to edit for a gig. If 30 of them need to be played on the same volume level, then l I have to program these 30 sounds again and next save them to new location. Besides, there's no good way to set fully fixed velocity in Program Mode - belive me I tried it many times with "velocity intensity" parameter set to 0 in program mode and some piano sounds always let me feel difference in sound or timbre level when I hit keys with more or less pressure.
You know, I'm a gigging musician and spending my music time on programming (I usually use 6-7 synths on the stage plus other stuff) is a lot boring and time stealin' (what with time to practice, studio?

. Many M3's factory presets are so beautiful, that I just want to assign them to timbres, make some small adjustments, set volume, splits, layers, switch on or off velocity scale (to make it linear or just fixed that will let me play a part of timbres on the chosen one velocity level) and... play!
I must agree that I want the velocity of a timbre to be fixed all the time during playing such programmed Combi. But why I have first to edit programs and save 2-3 copies of the same Program if i could have only one?
Some genres of music like jazz fusion, prog & art rock, metal and a few more don't need too many parameters to edit. Chose a sounds, make some settings, name & save combi and play. Leads, backing strings, some pianos on solos or brass patches are very often programmed to play them next at the same level of sound.
There is one more important word to say... I've been always a big fan of Korg! I usually say: "Korg and Kurzweil... and all the rest". Kurzweil instruments in setup mode (equivalent of Korg's Combi Mode as you probably know) have two very good parameters on the key/velocity page called: "velocity scale" (set in % +/-) and "velocity offset" (0-127 and inverse of it). Second of them adds proggramed, fixed value to the velocity produced on the keyboard during playing. So... If Velocity scale = 100% and velocity offset = 30, then when you hit key with e.g. vel.=60 it will be 90. But if you set "velocity scale" to 0 (zero) %, then velocity offset set to 100, will make always all notes with velocity=100 regardless of your preasure on a keys. It's practical and belive me... widely useful!
I don't want to argue with anyone... We are all musicians. All I want is make Korg synts a bit better (same like you I think) heh... better is wrong word 'cause Korg is the best!
I'm sure that fixed velocity parameter (or something like that) in Combi Mode would help make Korg's synthesizers a bit better and more intuitive. It would easily help people like me to focus more on playing and less on programming. That's my point of view...
Best Regards,
Perotinus.