Be careful how you phrase this. Stall often has slow mons, its true, however it also often relies heavily on a Scarfed mon to revenge kill threats it otherwise wouldn't usually beat. In Generation 5 (using it for reference since we don't have a Gen 6 meta yet), it was often stuff like Scarf Tar (trapping Starmie), and Stoutland.
Sticky Web puts a stop to this by cutting the speed of revenge killers stall might use, thus making Stall a little more vulnerable. It also limits something like Starmie, which usually relies on its nice speed and offensive presence in order to gain a free spin, since Spider Web cuts its speed, allowing something like Heatran to discourage a Starmie spinning on it.
Sure, I will freely admit that Spider Web is perhaps less effective against stall (when compared with something like Offense), but saying its utterly useless is a bit of a generalisation.
Also your list isn't that amazing either. Bulky Offence is still hamstrung by the lack of a solid revenge killer with Sticky Web in play, Flying / Levitating mons are limited, often crippled by SR, and still don't fix the problem with revenge killers, and Priority isn't really an effective solution when its fairly easy to find priority resists, and it still doesn't address the other 5 or so mons on your team. TR and Defiant/Contrary have terrible distribution / are uncommon and don't scale particularly well if Sticky Web isn't on the enemy team.
In general, the problem with Sticky Web is that it hinders Revenge Killing, which pretty much every teamstyle relies heavily upon. You just don't see many teams without a revenge killer these days, and Sticky Web limits your options to flying mons and levitators, the former of which obviously has to watch out for Stealth Rock. There isn't really an easy fix besides not letting it get up in the first place, since once up, a good player will exploit it by sending in the mon you need to revenge kill, and force the offensive pressure onto you and your team, much like standard HO would put yo under pressure in the Deoxys-D / Deoxys-S HO metagames.