They can dump pretty hard in the wind. I have noticed in a straight headwind or a R to L, that they dump very hard. In a L to R cross or headwind they finish much better.
FWIW, this has not been my experience exactly. I'd describe it more as having the fade kick in much later in the flight, at a much lower speed. So it's kinda "dumpy" in that sense. I just think of it as being much straighter. (Comparing a F @ 153 to a N @ 175)
Just to add my 2 cents, I would say that as a stable/overstable mold in a light weight, that the amount of HSS appears to decrease with the reduction in weight as one gets lighter in Fission (I have a 144, 153 and 163) but ultimately, when the disc hits the right speed, it will begin its predictable, reliable fade portion of flight.
Due to the disc being able to be exposed to ever increasing arm speed and being more subject to environmental conditions relative to its weight, the flight of the lighter disc can become more exaggerated in its transition from HSS to LSS, in my experience.
I've thrown a 175 N Proton as well, which comfortably took my power level, barely turned up, held and was transitioning to LSS much more quickly and gradually in the flight, so I would say I can relate to the 'dumpy' comment, but don't think it has anything to do with the plastic as much as the weight and physics. That said, with the increased torque applied to the lighter Fission, it can increasingly be used with some hyzer flip line adding the advantage of straightening the whole line out.
In the end, Fission allows us to bag the same familiar mold in a variety of weights adding utility to the disc at large. FWIW, I've currently found the heavier Fission to be perfectly suited to a workable, long-range control disc in my game.
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