Ah, hours of indecision....
Yes, reducing the scale helps you see the whole thing. It is easy to become fixated on one bit, even if you don't realise it at the time, and helps you check that, especially in a scrappy quilt, you haven't ended up with all the pink (or whatever other colour) bits in one corner. It's also easier to spot a block that's got a mistake in or is the wrong way round.
I made my mother a quilt for her 90th birthday. I pieced it, layered it, hand quilted it, but it was only when I gave it to her and took a photo of it on the bed that I saw the bit that was the wrong way round (too late; it's the humility patch).
A reducing glass (opposite of a magnifying glass), or the cylinder viewer from a door peephole, or even looking through the 'wrong' lens of your glasses shrinks the view and gives you a whole new perspective.
I wish that I'd made it with the very darkest fabric as the very longest strips - but you learn as you go, don't you?
@LeilaMay Yes you learn as you go. Colour placement is a matter of personal preference, often influenced by how much of a fabric you have. It pays to spend a few minutes with squared paper and crayons and draw different versions. Where you put the light and dark tones can completely change the look, and lead to even more hours of indecision....and purchase of more fabric.