Had a go on the new GSA today and definitely a very good bike
At 6' 3" the ht of the bike is not a problem for me although even on the high seat setting it was more cramped than my standard GS LC with Touratech high seat and Wunderlich low foot rests.
Screen was good but not as good as the MRA X-creen on my bike.
Seat not very comfy - too squidgy.
Power delivery is smoother/more refined due to bigger crank I guess and certainly does not pick up revs as quick as my bike. Feels more like the old Hex head in that respect.
Strangely there appeared to be some vibes coming through the pegs which I do not get on my bike (Wunderlick pegs on mine do not have rubber inserts either).
Suspension definitely more soggy compared with mine and handling no where near as flickable but still a fine handling bike never the less.
Still do not like the looks of the bike just does not look right some how.
Overall I would say it is a better bike for riding in a more relaxed manner and therefore a better tourer but still prefer my bike overall with it's more precise handling and get up and go