I use various libraries from multiple companies, what does matter though in regards to your question is to play with their mic settings (if a library doesn’t provide different mic recordings then better stay away from it) and use an XY stereo mapper to give them their proper space. It is also much harder to achieve an authentic sound with solo instruments, something I had to deal with in my 3rd track “Pure Genius” where a solo Clarinet and Violin are playing in unison.
Again, instead of just using the standard L-C-R pan control try using an XY stereo mapper which Cubase does come with one. It is so useful…