first of all you say that there has to be an explanation if we were to extend the evasion clause from moves only,to items and abilities...The Evasion Clause was only for moves which increased Evasion; if we are to add abilities and items to it, there has to be an explanation, you can't just say "it belongs to the Clause" because it never actually belonged to it.
If Garchomp is the only real abuser of it, then I can't see why we can't consider it part of Garchomp and thus, ban Garchomp as "the pokémon which has a 20% chance of evading any move in Sandstorm".
And I guess no one noticed, but Rising Dusk banned Brightpowder in every other gen because "it was banned for being a violation of Evasion Clause". I hope you guys realize that, if we were to ban Sand Veil/Snow Cloak for that same reason, Froslass would be Uber in DPPt.
so what explanation was given to the fact that the evasion raising items were banned in the last suspect test?
(if the reason was that they violated the evasion clause then that's true for sand veil also...)
none i think except from the idea within the voters head's:evasion is uncompetitive!
the only reason(at least that's what i think)that the evasion raising abilities have not yet been banned is that their banning would have some obvious downfalls like limiting some pokes movepools or even entirely banning some pokes from ou play(garchomp).
or if we implemement a complex ban(evasion raising ability + respective weather ability) the downfall is that it will set precedent for even more complex bans(which is very untrue for the current complex ban).so if we didn't have any downfalls by banning sand veil and snow cloak(either by a simple or by a complex ban)it would already have been done.
'casue we would have removed something negative from the game without losing anything...
that's the reason that the evasion raising items were banned!they only added extra hax to the game without any other purpose and there weren't any downfalls to banning them so why not?
why not make the game slightly better and slighly more competitive?it's a win win situation...