Okay look, the point here is simple. The very fact that you need a favor item in the first place, Symbol of Purity, for Assassins most of the time is why this is an issue. Yes, we know it works, and I agree it does, but the rock bottom point is that you have to use a favor item to counter it. Players need to be on equal playing ground, each player should be able to choose a Favor item which is complimentary to greater objective, not simply one Demigod. Brandishing a Symbol in a larger Demigod game will often lead to a loss becauee the enemy gets to use the ones which gives them advantage, while you are forced to use poor items just to survive one Demigod's attack.
Aruge all you want about "Oh that's just how it is", well let me tell you, that's not exactly how this game is intended to play. This thread has been created to see how people thought about it, but no one is really providing any sound arguments on why a scroll to shed away negative effects is not a good idea. Heck, in hindsight it probably could even use an alternative use. Such as being used on an enemy Demigod to remove positive effects. Such as Bramble Shield, Oak's Shield, Last Stand, and various other things.
Just last night did a 4v4. I played a Queen, and someone else played as Queen. We also had Sedna and the ridiculously powerful Unclean Beast. The two Queens had the exact same Bramble build, and we just kept spamming shield over and over and over and over. Out primary melee Demigods never took damage, it was an easy win because even in mass the enemy just couldn't ever deal damage. It's be very nice to have something to make shields and other positive effects useless for a short duration, and that'd probably even include heal too.
Generally when you want something nerfed (which is what you're asking for) you need to prove it should be. Spit has multiple counters one of which is don't let UB get that close but you act like generals and symbol of purity is the only way. Symbol of purity is simply one way of countering it. Another would be to itemize more for health then damage or to carry potions to counter. If I face a UB with an assassin which isn't that often which is weird if UB's "so powerful." I take into consideration that i'm facing a UB, spit is his only strength so I need to avoid dieing early so I can starve his cash and stop his early game advantage. No pont in typing them up though, as you'd dismiss them anyways.
Having to take into account UB's spit is no different from having to take into account sedna's heal or QoT's shield. It's the main focus point of the demi-god and unless your scroll counters all the demi-gods focus points it's being biased to hating one demi-god. So yeah i'll be all for the scroll if it:
Stops sedna's heal, Qot's shield, Rook's hammer slam or towers, regs snipe or mines, erebus' bite, TB's deep freeze and fireball, and oak's shield. Plus removing spit, as then it's balanced, but to do all that it'd need to cost as the bare minimum 1500.
No one's forcing you to take symbol of purity, it's simply the easiest none general spell to counter it. That doesn't mean there aren't other ways.