In a part where multi-bar rests are consolidated, i find the single-bar rest too big in comparison to a single bar in a non-consolidated part. See the differences in the screenshot: the consolidated part needs even more staves in this case. i know how to specify a smaller default width for single-bar multirests, but I find them rather inflexible. I would prefer the single-bar multirest to scale to the same width as a whole bar rest would have in a non-consolidated part (but still with a ‘1’ above it, of course).
At the moment, you have to choose, I’m afraid, between showing the 1 above it, in which case it gets the fixed width of a multi-bar rest, or not showing the 1, in which case it will be spaced like a regular bar rest. The combination of the two is not currently possible.