Well Jick Duck, I don't know what to say. It is to bad you are having all these issues. I would say it is not the result of you using a demo version. There is just something not working properly with your software and hardware - but I don't know what. I assume you have done the factory resets in Live - Styler and downloaded a recent update from N. Stellberg's web site. There could be communications problems with VSampler with respect to some of the issues, e.g., harmony - only guessing.
As you know, I have two computers (AMD & Pentium) and with the exception of the features you would like I have none of the issues. You will also recall before forte I used a very complex system of Cubase SX, Project5 rewired, VSTis and effects without glitches or crashes - none. This is what you would require (as you pointed out)for live performance applications.
So the features you point out in 2, 3, 6, and 7 could be added but this depends on whether they are practical to implement and what other users are requesting. The issues with respect to bugs and crashes should be identified to N. Stellberg and I am certain he will resolve them.
Jick Duck, I think it would be best if you identified your list of concerns to N. Stellberg rather then me doing it. Even if he does not respond he will likely resolve them in the next update.