Yep those two decks may be the exception showing that web may be eventually usefull.
Now they are more based on the power of upgraded spiders (and upgraded poison for the death deck) than on wings (the rushing power of these decks is probably enough to kill a 100hp opponent without even using the defense, wings just allow them to also be decent FG decks).
I'm more curious of any spider/wings combo someone succeeded to use in unupgraded pvp, with spiders not being first class offense creatures, and with the opponent using cleverly the creature control and permanent control most pvp decks have if spiders/wings annoy his strategy.
In my experience, an air/death deck has far more lasting power taking a bone wall and an owl eyes or cc spell like shockwave, thunderstorm or plague than taking a spider + wings. And an aether/air deck taking a dimensional shield and using the freed card space for anything more powerful than a spider (or even better, taking a firefly to fractal and hope, to be less vulnerable against permanent control).
ps : another possibility for a change
Web, cost
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, removes the airborne passive ability, and any other skill the affected airborne creature had.
(would make it a lobotomy limited to airborne creatures, and so affecting : ray of light, fireflies, dragonflies, pegasus, wyrm, vampire, firefly queens, gargoyles, accelerated dragons, etc... a less situationnal very good counter against a bunch of efficient strategies, desserving an increase in ability cost -this increase allowing to keep the spiders themselves unchanged, as cheap rushing creatures)