It's unfortunate that there is no pan facility on Vienna Instruments patches (nor in Forte). It's unusual for a virtual instrument to lack panning controls, MIDI channel select and user-definable ranges, but the VI has been designed with other priorities in mind.
>Should I go back to my old (GS3+ Sonic Implants) setup?!
You'd lose all the wonderful VI facilities such as the brilliant performance legatos and extensive articulation switching within one instance. If you bought GVI (GigaStudio Virtual Instrument) you could run your Giga libraries alongside VI SE under Forte. Your VI samples will still be centrally panned, but you could freely pan the GVI instruments as you did with GS3!
>Should I go back to my old (GS3+ Sonic Implants) setup?!
You'd lose all the wonderful VI facilities such as the brilliant performance legatos and extensive articulation switching within one instance. If you bought GVI (GigaStudio Virtual Instrument) you could run your Giga libraries alongside VI SE under Forte. Your VI samples will still be centrally panned, but you could freely pan the GVI instruments as you did with GS3!