I have FM8, and it is a good FM synth, but... imho. it does NOT sound as good as the YAMAHA FM DX/TX Synths.
One of the areas FM8 seems to fall short is re-producing some of the more rich, bright plucky string sounds that the DX/TX Synths were able to produce, these sounds are similar to steel guitar plucking sounds, with a very rich timbre, I tried for days to program this type of sound, but no luck, FM8 couldn't do it.
If you listen to Tangerine Dream's (Optical Race) album, you will hear this sound a lot, it is the metallic/bright string sound they use, kind of similar to plucked steel acoustic guitar sound, in melodies, and some rhythmic/arp type phrases on this album. They used the TX802 and possibly DX7's for this type of sounds on the album. If you can duplicate this sound with FM8, let me know. This sound was impossible to re-create via FM8, and non of the library sounds gets close to this sound.
I feel that Steinberg/YAMAHA can make a much better sounding, and more accurate FM synth that emulates the old YAMAHA FM synths. So.. I see no reason why to not support this request. FM8 is ok, but lacks a lot of character, and presence when compared to the real YAMAHA HW FM synths, especially when trying to create rich, and complex metallic timbres similar to the one I mentioned.
Cubase 7.5, Halion 5, Halion Sonic 2, Padshop Pro, RND Portico EQ & Compressor, Wavelab 8, 3 X PC systems, 2 X RME UFX Audio Interfaces.