There are two different conventions I have seen for orchestra scores. In one, the full orchestra is shown on every page. Even if the flutes don't play a single note, (for example) their staff appears filled with rests. I find this kind of score easier to conduct from because my eyes are used to looking for each instrument in it's regular place in score order. In the other convention, which I'll call "optimized," any instrument that does not play on a page does not appear at all. In this manner many more measures of music can fit on a page because two or three "systems" of music can fit vertically if many instruments are resting. Naturally, optimized scores use far less paper.
Now here is my question. I'm working on a large piece for orchestra and chorus, around 40 minutes in five movements. For most of the movements, enough of the orchestra is playing that I wouldn't be able to fit two systems on many pages. So I decided to use the first convention and include every staff on every page. But one movement is performed with only strings, woodwinds, and chorus. With no brass or percussion, I could save many pages by optimizing this one movement. Would such a score cause confusion or turn away conductors? I have never seen a score that switches between optimized and not mid-stream.
EDIT: If it matters, I use Finale.