Don't worry, the new MS styles developer will make new native MS Audio-Midi styles too.
The qranger tool offer the possibility to import the al others brands styles, why we have to remove this feature it IF the all others still make the same??
Or you mean that Roland have factory developed 16.000 styles??

Remember also one stuff:
Mediastation is a PC based system, with GIGA sampler, VST and other sounds PC engines and NOT a ROM+DSP based systen like the all embedded keyboard.
With the ROM+DSP engine, you can control and levelling perfect the all sounds/styles, under a PC open system, this is like impossible.
Each GIGA, VST...have a different sounds and volumes engine, depend how many oscillators, voice... you open and every time the global volumes will change and not levelled.

So..with the MS you have to choose one compromise system, IF you like to open so many VST, GIGA, Synth's, you must also accept this all compromise..
in my MS Pro I just have installed one AMD Athlon XP dulacore 5200+, 8Gb RAM system and I have open and played about 1300 Voices.
This was just for testing the Linux OS, but of course the globally volumes OUT had changed totally! Was not a stereo HiFi CD player...
It is a compromise... you have to choose what is better for your gig's.
For play some Bossa Nova with a nice guitar and sax...I'm the first to tell you to buy one Tyros 3.
the problem is that my clients do NOT want this...this is my problem.
cheers