If I've said it once I've said it a thousand time – I don't see the point in sport tourers. Designing and building a motorcycle that is by definition slower, heavier, and less responsive than it could be is a bit like conceiving a super model with cellulite and a fat behind... Who's gonna key into that?
And the advantages? More torque? Who cares about torque? It's boring. Give me a frenetic rev-band to aim for any day. More upright riding position? Who want there gregory sticking out in the breeze like a police escort rider and all that pressure on their postupedically pressured spine when it could be tucked down safely out of harm's way in mock doggy style?
More space? Who needs space when you only do size eights – tens at a real politically correct push. To me a sport tourer still has to have the quintessential characteristics of a sports bike – namely it must be incomparably sexy (which precludes any sort of fixed baggage – including wives...), and be inherently responsive, which means good power to weight.
At the same time a slightly more generous fuel range might be an advantage, as would be build quality that precludes the thing breaking down less than that new improved fuel tank range.