Thank you for joining the discussion! Since this thread happened, I've found a few new options.
I still use Sibelius due to large assignments still needing to be done. After May, I'll have more downtime. I'm going to give Dorico 3 a shot. Mainly because although Dorico isn't a DAW, it has gained so many more DAW like features. Now it gives the option to edit midi information and other automation things with envelopes. So although you do still need a DAW for audio purposes, most of the midi prep can be done in the notation software, and a lot of the changes can be changed and saved with the symbols. A FP dynamic can be mapped to a specific velocity curve and saved to a CC value, then exported with the midi. When imported into the DAW, this takes care of most of the editing work that would need to happen in the DAW normally.
So for the purposes of using notation software like a DAW, Dorico 3 looks to be the closest bet. It currently supports sample libraries, but their use is somewhat unwieldy. I'm fairly confident that by Dorico 4 the level of sample support will grow to a point when you can enter everything in notation, then do some editing in the same program, and have a mockup using samples that is much more efficient that ever before. Especially since it is highly likely that the template will be adjusted organically (assigning an accent symbol to automatically layer a staccato and legato patch at the same velocity). I wouldn't be surprised if this is already in the works, or does exist in 3 with some semblance of functionality.