I'm using X1 and Garritan Jazz Band for wind instruments arrangement. I use midi tracks for recording, editing them on PRV as required.
While I don't use SV for any note entry, I will check on SV very often as the arrangement develops. At the end of the process, I like the simplicity of printing score directly from X1 and hand over to my band for rehearsal.
So for me, SV is very important and I like to see SV updates in future releases. There are well known limits, and I do my best to submit feature request, more than once, as I may have forgotten what I've submitted - until it's updated, hopefully.