I think you didn’t try enough.
Finale and Sibelius are not the best tools for composers in my opinion, but mainly intended for engravers.
If you’re a composer, for me there is no better tool than Cubase.
Like you, I write for orchestra and Cubase and its Score Editor are invaluable in this matter.
Your problem, if I understand correctly, is that you play your music “naturally” on your MIDI keyboard and then try to edit the notes to make them look good in the score. It’s probably not the best way.
This could work very well in one condition : you have to use the metronome and always play precisely on the beat and in addition use the quantize fonction, in order to have the most intelligible score to begin with. You’ll have a lot less work to do in moving and editing notes in the score.
You can then humanize the playback by tweaking the tempo and the delays etc.
The best way would be to enter notes directly in the score using one of these following methods : the mouse, your computer or MIDI keyboard.
So if you’re working for a client and under time pressure, and you really need a good looking score, your best bet would be the first method (recording your music first), but, as I said, you’ll have to play as mechanically as possible to get the best looking score to begin with and then work with Display Quantize as Vic suggested.
Hope that it helps, while waiting for Dorico integration into Cubase.