Hello Major7th,
Groove3.com has a sample
+++ video tutorial +++ featuring the Soloist. Click on the link and the second sample tutorial is "Using The Soloist".
To me your question reads somewhat like a comment or observation that many of the Soloists are too busy. If that is in fact the case then you may want to consider composing a suggestion to post in the
+++ Band-in-a-Box Wishlist +++ forum section.
Here are a few suggestions you may have already considered:
Open the Soloist using Shift+F4 or the icon, select a Soloist then select the "More". Changing "Use large Soloist files" & "Create long phrases" changes the material the soloists uses to create its solos.
In the Soloist window select the Soloist Maker "Edit..." button. Then try different settings with the checkboxes in the bottom right corner of the screen.
If you are not familiar with these settings, the Help button in each window is your friend.
There are several PG Music video tutorials on the Soloist feature on the
+++ Support +++ webpage. I opened a search window using Ctrl+F and using the search term "solo" found multiple videos with the latest from 2019.