I personally think that the AT has awsome suspension and it is definitely suited for my 87kg weight (haven't had a pillion on the back as yet). I have spent lots of time and money on other bikes setting up suspension and the AT is great (for now)! Yes, I agree if you are a heavier build, you would need to invest on some springs to set up the bike for your weight. I need to add that I have adjusted ALL settings, and will continue to 'fine tune' them till I get them to my personal riding style. I rode last weekend in some VERY testing conditions and the bike handled way much better than my 990 with a whole new front end set up. My advice to anyone riding an AT is to play with the settings first, don't go spending lots of money on suspension until you have actually ridden the bike 'off road' (gravel and dirt roads don't count), then if you arn't satisfied, buy a set of decent springs, but talk to someone you can trust and has industry expertise. I am sure that in the future a new set of springs will be purchased and some further adjustments made, but for now, the AT has way out performed my expectations!
"Men do not stop playing because they grow old, they grow old because they stop playing."
O. W. H.