I indeed have moved on to Synchron libraries from VI, but be aware there are two avenues to pursue positioning for VI instruments in the VSL ecosystem.
First, you can buy individual MIRx venues that are directly assignable within the VI Pro player. These include positioning options.
https://www.vsl.co.at/en/MIRx/MIRx_Bundle
Second, you can buy MIR Pro 3D, a sophisticated graphical tool for among other things user-adjustable positioning.
https://www.vsl.co.at/en/Vienna_Software_Package/MIR_Pro_3D
If interested in MIRx, you would want to get it during the current sale which technically shows expiring as of Sep 30th, but it wouldn't surprise me if this was extended another month, especially since it looks like it is still on sale as of this afternoon, Sep 31st.
Synchron - Woods, Brass, Perc I, Str Pro, Elite Str, Duality Str & Sordino, Prime Studio - Woods, Perc, Solo Str, Ch Str, Orch Str, App Str, Harps, Choir Studio Dim - Brass, Strings VE Pro, MIR Pro 3D, Vienna Suite Pro Cubase 14, Studio One 6, Dorico 5