Collect sheets like in a sheet with parts

I have a feature-request:
Could it be possible for prospective releases of musescore to make sheet collections?

For example, I have 3 musescore-files with one part of a bigger piece and collect them into one file. They are arranged like with a sheet with parts of the instruments. So there is a main bar for the hole piece and different bars for the parts, what's looks like with instrument parts at now. If there are instrument parts in a part of the sheet, they are arranged in a third bar below the part-bar.

When the playalong starts, musescore switches to the next part, like after a section break.

For exporting all sheets, I can collect the main bar of the Sheet-Collection and go to export. For exporting only one part, I have to choose the part-bar.

Maybe somebody has other ideas for a solution or reasons why it can't be realized?