This is one of those love-it-or-hate-it items I think.........personally I think the segmented assembly has a custom one-off look that accentuates the "visual mechanicals" look of the SF nicely. If the bottom can hangs down very much I'm not sure I'd like that..........we'll just have to wait and see.
I'm not an engineer or an advanced tuner (anything beyond jetting makes my brain hurt!) but from what I gather shorter pipes can be harder to tune for low/mid range power. That being said I think that the use of highly flexible aftermarket tuning electronics (usually required on the 1098SF for proper fueling anyway) would allow a nice dyno tune with almost any pipe.
Husky 610 'tard
'01 ZX7R (too fat to fly)
'74 RD400 Daytona