1: Thunderus dosen't die to Scizor
2: Thunderus isn't Persuit Bait
3: Thunderus can mess up things with Priority Taunt/T-Wave
4: Thunderus benifits from weather, which Azelf does not.
Also, all of your calculations are based on Azelf being at +2. Thunderus's coverage [Electric is far superior to Psychic] and slightly better bulk, and a lot more resistances, as well as the threat of Prankster really helps Thunderus get his set-up.
Azelf isn't going to be switching into... more or less anything in OU, much less getting a +2 boost without losing 50%+ of it's HP.
1: Azelf doesn't die to Mamoswine
2: Azelf can wreck every single pursuit user
3: Azelf can use physical sets, and mess things with trick, set up rocks, screens
4: Azelf isn't fucked by stealth rock
I don't see your point, everything that you listed are very poor reasons of why Azelf doesn't work, I don't remember Thundurus OHKOing Jirachi without nasty plot either, and since when it can switch in into something?, stealth rock does 25 % to it and if say "Earthquake" well Azelf can do that too, you set up on the switch, not infront of a choice banded user or a Chansey (that's retarded, those things can fuck you with t-wave or toxic), why I'm explaining this?, it should be obvious, Thundurus isn't Lugia, the only way that it can set up is forcing something out, same for Azelf, your "slightly" more bulk is worthless if you're sr weak