the measure that we seem to be talking about in lifting and maneuvering the bike around is center of gravity and center of mass(dynamic effects)
the boxer twin has traditionally allowed these to be lower...just like Porsche etc
jacking the bike up for high ground clearance kills these benefits.
what puzzels me in the new GS ia that BMW has again put the gas tank yet again at the highest(worst) point possible.
They allso make the tail end of the bike unnecessary high...far more than the rear suspension travel demands, and this put both the side bags and top bags higher that necessary.
all of these things raise the C of G, make the bike harder to pick up, and make slow speed dynamic handling more difficult.
The F800 series atleast puts the gas lower under the seat.