The same is said about Deoxys-A. In other words, Deoxys-A is a piece of crap for not being immune to all forms of residual damage. While we're at it, might as well demote Mewtwo and non-Steel Arceus.
Unlike Deoxys-A, Deoxys-S can't stay in and OHKO everything. It needs to come in on something it can KO and hope it gets the switch right. If Deoxys-A gets the switch wrong, oh well, it can just use another move and almost be guaranteed to get a OHKO.
Probably because he was already tested in the first Smogon Wifi Tournament.
Early Wi-Fi is nothing like Shoddy one year later. And I've seen that test, I asked about it before, and I got linked to this one war story that everyone was saying "proves" it's broken. Looking at it objectively, it really didn't seem that bad. People were just confirming their bias that Wobbuffet is uber by seeing it on the winning team.
A poke named Cresselia another psychic 600 pokes which is defensively better than Deoxy LG is allowed in the game.The truth of matter almost anything that counters Cresse should counter deoxy LG.
Except that Deoxys-D gets Recover, Taunt, Superpower (for those annoying Pursuiters), Thunderbolt, Spikes, Knock Off... Worse stats and a generally worse trait doesn't mean the Pokemon is worse.
We have to go one Uber at a time here, people. Let's focus on Deo-E first; you can't have two test phases at the same time.
I'd say that's the best way to do it. Allow everything that's under consideration at once. You're allowed to reban things in stages. Imagine if Blissey and Salamence were banned. First we allow Salamence, and Specsmence kills everything (and Empoleon, Heatran, and the like aren't considered to be both good enough and reliable enough), so we decide to ban it. If we had just allowed it with Blissey, things might have turned out differently.