Hi Christian,
we’re working on adding the functionality to change the spelling of notes after entering. For now, this is only possible by setting the accidental via the note toolbar before entering notes with the pencil tool or stepinput.
Staves can’t be dragged directly in the new Score Editor. The various Layout Settings should enable you to get to a nice score without manually tweaking every individual system. If you show specific examples (ideally with a small project file), maybe we can suggest a few specific settings to tweak.
You can use Cubase 13 with your Cubase 14 License in the meantime, if you prefer to use the old Score Editor.