Hi Create-compose
There is a plugin for Sibelius called 'Graphical Midi Tools' that allows you to enter midi CC curves for any CC value you like, straight into your Sibelius score, and the midi curves are laid over the score so you can see the ebb and flow of everything in a really nice way.
You can also adjust velocity of individual notes, and adjust note timing to fine tune legato passages for example.
It's wonderful...I use it all the time and is the main reason I don't use Logic Pro!
I've done a few video reviews of it on my YouTube channel..heres the link
And here's the link to the developers website https://santiagobarx.com/
With a library like VSL's Solo strings......it's just magnificent!
Noteperformer is ok..but in all honesty cannot really compete with VSLs samples. If you have any VSL instruments you'll be able to install the sound set for them so they work in Sibelius perfectly...its brilliant...and if you choose to do so, I hope you enjoy it just as much as I do mate
I hope that helps
With kindest regards
Paul